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diff --git a/content/les-planches/planche-001-les-pieds-sur-terre.md b/content/les-planches/planche-001-les-pieds-sur-terre.md
index f649ad3..4a197fe 100644
--- a/content/les-planches/planche-001-les-pieds-sur-terre.md
+++ b/content/les-planches/planche-001-les-pieds-sur-terre.md
@@ -68,13 +68,16 @@ Le « trop » qui pourrit est l'argent, bien entendu.
 
 <div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video
+ poster="{static}/images/thumbnails/video_1bis.jpg"
+ width="320" height="240" controls>
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_1bis.mp4" type="video/mp4">
 </video>
 </div>
 
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_1_recto.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_1_recto.mp4" type="video/mp4">
 </video>
 </div>
diff --git a/content/les-planches/planche-002-recto-jose-est-mon-second-nom.md b/content/les-planches/planche-002-recto-jose-est-mon-second-nom.md
index 2d83630..1b1ded3 100644
--- a/content/les-planches/planche-002-recto-jose-est-mon-second-nom.md
+++ b/content/les-planches/planche-002-recto-jose-est-mon-second-nom.md
@@ -34,6 +34,7 @@ Réflexion ironique et malicieuse d'Eugène sur lui-même et son travail.
 
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-002-verso-he-gene.md b/content/les-planches/planche-002-verso-he-gene.md
index 05ff19a..c9a2a49 100644
--- a/content/les-planches/planche-002-verso-he-gene.md
+++ b/content/les-planches/planche-002-verso-he-gene.md
@@ -31,6 +31,7 @@ Eugène s'interpelle lui-même avec autodérision. Il confirme là également qu
 
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_2bis_2_.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_2bis_2_.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-002-verso-les-betises.md b/content/les-planches/planche-002-verso-les-betises.md
index d515a90..8843db8 100644
--- a/content/les-planches/planche-002-verso-les-betises.md
+++ b/content/les-planches/planche-002-verso-les-betises.md
@@ -26,6 +26,7 @@ Hé ! mon Gène ou Joseph, tu t'es bien mieux souvenu de toutes les bêtises qu
 <p style=text-align:justify;">Eugène se moque ici joyeusement de lui-même. Il nous révèle également que le personnage de Joseph ou José, qui apparait fréquemment sur ses planches, n'est autre que lui-même.</p>
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_2bis-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_2bis-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-003-retournez-moi.html b/content/les-planches/planche-003-retournez-moi.html
index f053e8a..7fd82d7 100644
--- a/content/les-planches/planche-003-retournez-moi.html
+++ b/content/les-planches/planche-003-retournez-moi.html
@@ -71,7 +71,8 @@ <h2>Commentaire</h2>
       gouvernemental sous la 4ème République.
     </p>
 
-    <video width="320" height="240" controls>
+    <video width="320" height="240" controls
+           poster="{static}/images/thumbnails/video_3.jpg">
       <source src="https://d1njpgd0ygatdn.cloudfront.net/video_3.mp4" type="video/mp4">
     </video>
 
diff --git a/content/les-planches/planche-004-face-aux-loups.md b/content/les-planches/planche-004-face-aux-loups.md
index ae33448..49a3423 100644
--- a/content/les-planches/planche-004-face-aux-loups.md
+++ b/content/les-planches/planche-004-face-aux-loups.md
@@ -40,6 +40,7 @@ femme » de sa connaissance qui a inspiré à Eugène cette maxime. Elle
 avait été arrêtée par les gendarmes sur la route à cause d'un phare
 cassé et se vantait d'avoir réussi à les amadouer.</p>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_4.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_4.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-005-ouvre-bien-grand-tes-oreilles.md b/content/les-planches/planche-005-ouvre-bien-grand-tes-oreilles.md
index 5967001..265167f 100644
--- a/content/les-planches/planche-005-ouvre-bien-grand-tes-oreilles.md
+++ b/content/les-planches/planche-005-ouvre-bien-grand-tes-oreilles.md
@@ -38,6 +38,7 @@ les meilleurs chemins.
 Cette planche a été donnée telle quelle à Eugène. C'est sa forme si
 particulière qui lui a inspiré le texte.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_5.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_5.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-006-un-sabot-pour-crey.md b/content/les-planches/planche-006-un-sabot-pour-crey.md
index f205222..d24dbd6 100644
--- a/content/les-planches/planche-006-un-sabot-pour-crey.md
+++ b/content/les-planches/planche-006-un-sabot-pour-crey.md
@@ -35,6 +35,7 @@ Cette plaisanterie était fréquemment réitérée pour se moquer gentiment
 des personnes qui avaient de grands pieds.
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_6.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_6.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-007-la-maison-de-mathieu.md b/content/les-planches/planche-007-la-maison-de-mathieu.md
index 502eb68..388beb4 100644
--- a/content/les-planches/planche-007-la-maison-de-mathieu.md
+++ b/content/les-planches/planche-007-la-maison-de-mathieu.md
@@ -30,6 +30,7 @@ moi, je n'y ai trouvé qu'un bon diable.
 Se disait couramment. Jeu avec les expressions courantes : « Maison du
 bon Dieu » et « Un bon diable ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_7.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_7.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-008-recto-le-prix-de-la-terre.md b/content/les-planches/planche-008-recto-le-prix-de-la-terre.md
index 830350c..a173415 100644
--- a/content/les-planches/planche-008-recto-le-prix-de-la-terre.md
+++ b/content/les-planches/planche-008-recto-le-prix-de-la-terre.md
@@ -40,6 +40,7 @@ un stagiaire camerounais à propos de la valeur de la terre. Pour
 celui-ci, comme pour Eugène, elle ne vaut que par le travail qu'on y
 met, et la nature ne devrait pas être privatisée. </p>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_8.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_8.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-009-recto-ne-coupez-pas-mon-vin.md b/content/les-planches/planche-009-recto-ne-coupez-pas-mon-vin.md
index 0ca5e40..efcb7d4 100644
--- a/content/les-planches/planche-009-recto-ne-coupez-pas-mon-vin.md
+++ b/content/les-planches/planche-009-recto-ne-coupez-pas-mon-vin.md
@@ -36,6 +36,7 @@ Eugène reprend des phrases lancées avec humour entre convives au cours
 des repas de « batteuses » qui réunissaient une douzaine de personnes
 après les travaux partagés.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_9.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_9.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-009-verso-un-peu-de-respect-pour-le-nouvel-elu.md b/content/les-planches/planche-009-verso-un-peu-de-respect-pour-le-nouvel-elu.md
index d538f43..d5a6017 100644
--- a/content/les-planches/planche-009-verso-un-peu-de-respect-pour-le-nouvel-elu.md
+++ b/content/les-planches/planche-009-verso-un-peu-de-respect-pour-le-nouvel-elu.md
@@ -44,6 +44,7 @@ gentiment de lui, lorsque il a été lui-même élu conseiller municipal à
 Viriville pour la première fois.
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_9bis.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_9bis.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-010-recto-paille-paille-paille.md b/content/les-planches/planche-010-recto-paille-paille-paille.md
index dc661c6..188e707 100644
--- a/content/les-planches/planche-010-recto-paille-paille-paille.md
+++ b/content/les-planches/planche-010-recto-paille-paille-paille.md
@@ -43,6 +43,7 @@ chanter en patois, une botte sous chaque bras, cette amusante petite
 comptine qui lui est restée dans la tête : *« Pâille Pâille Pâille,
 Paye pa biên mé empâille Biên »…*
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_10.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_10.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-010-verso-tu-boites.md b/content/les-planches/planche-010-verso-tu-boites.md
index ad6b877..8647288 100644
--- a/content/les-planches/planche-010-verso-tu-boites.md
+++ b/content/les-planches/planche-010-verso-tu-boites.md
@@ -33,6 +33,7 @@ Une « jaunasse » est une fiente. Le plus souvent, on donnait à picorer
 aux poules sur le seuil des maisons ce qui occasionnait parfois
 quelques « dégâts » pouvant s'avérer dangereux pour la santé !
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_10bis-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_10bis-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-012-horloge-dou-topie.md b/content/les-planches/planche-012-horloge-dou-topie.md
index b166a56..409194d 100644
--- a/content/les-planches/planche-012-horloge-dou-topie.md
+++ b/content/les-planches/planche-012-horloge-dou-topie.md
@@ -84,6 +84,7 @@ du taupier allait régulièrement rechercher les taupes tuées par son
 maître et jetées dans les buissons. Le taupier pouvait ainsi
 grandement améliorer ses revenus.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_12.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_12.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-013-bien-chausses.md b/content/les-planches/planche-013-bien-chausses.md
index 366cbf6..b49a8f8 100644
--- a/content/les-planches/planche-013-bien-chausses.md
+++ b/content/les-planches/planche-013-bien-chausses.md
@@ -38,6 +38,7 @@ surtout rappeler l'importance de pourvoir les jeunes d'une bonne
 Ce texte lui permet également de montrer quelques objets de sa
 collection d'outils agricoles.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_13.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_13.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-014-le-vent-du-midi.html b/content/les-planches/planche-014-le-vent-du-midi.html
index 4daa9bc..9e06e43 100644
--- a/content/les-planches/planche-014-le-vent-du-midi.html
+++ b/content/les-planches/planche-014-le-vent-du-midi.html
@@ -59,7 +59,8 @@ <h2>Commentaire</h2>
       locale.
     </p>
 
-    <video width="320" height="240" controls>
+    <video width="320" height="240" controls
+           poster="{static}/images/thumbnails/video_14.jpg">
       <source src="https://d1njpgd0ygatdn.cloudfront.net/video_14.mp4" type="video/mp4">
     </video>
 
diff --git a/content/les-planches/planche-015-ina-brava-teta.md b/content/les-planches/planche-015-ina-brava-teta.md
index a3a5935..a5860ca 100644
--- a/content/les-planches/planche-015-ina-brava-teta.md
+++ b/content/les-planches/planche-015-ina-brava-teta.md
@@ -45,6 +45,7 @@ trébuché manquant de tomber du « gerbier ».
 
 Cette scène reste très présente dans la mémoire d'Eugène.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_15.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_15.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-016-recto-se-sauver-ou-s-abriter.md b/content/les-planches/planche-016-recto-se-sauver-ou-s-abriter.md
index 1146cee..da03306 100644
--- a/content/les-planches/planche-016-recto-se-sauver-ou-s-abriter.md
+++ b/content/les-planches/planche-016-recto-se-sauver-ou-s-abriter.md
@@ -45,6 +45,7 @@ termes « l'ourri » et « l'assoute » qui signifient tout deux
 même temps une réflexion personnelle qui interroge sur un choix
 philosophique fondamental.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_16.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_16.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-016-verso-la-cuisse-de-jupiter.md b/content/les-planches/planche-016-verso-la-cuisse-de-jupiter.md
index 02f4b5b..bca53c8 100644
--- a/content/les-planches/planche-016-verso-la-cuisse-de-jupiter.md
+++ b/content/les-planches/planche-016-verso-la-cuisse-de-jupiter.md
@@ -56,6 +56,7 @@ planche qui les a inspirées.
 
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_16bis.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_16bis.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-017-recto-vaut-mieux-rien-dire.md b/content/les-planches/planche-017-recto-vaut-mieux-rien-dire.md
index 21f00bc..3646cb6 100644
--- a/content/les-planches/planche-017-recto-vaut-mieux-rien-dire.md
+++ b/content/les-planches/planche-017-recto-vaut-mieux-rien-dire.md
@@ -59,6 +59,7 @@ C'est pas du brouillard toute cette fumée !  C'est bien du feu !
 - « C'est bien du feu ! » est le raccourci de « Il en reste toujours
   quelque chose » ou « Il n'y a pas de fumée sans feu ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_17.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_17.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-017-verso-au-pied-de-mon-arbre.md b/content/les-planches/planche-017-verso-au-pied-de-mon-arbre.md
index 9b93475..23a768c 100644
--- a/content/les-planches/planche-017-verso-au-pied-de-mon-arbre.md
+++ b/content/les-planches/planche-017-verso-au-pied-de-mon-arbre.md
@@ -53,6 +53,7 @@ d'mon arbre… »*. Eugène l'a gravée après avoir abandonné ses
 responsabilités syndicales et communales. Il disposait ainsi enfin de
 plus de temps pour jouir de son bel environnement des Chambarans…
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_17bis.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_17bis.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-018-recto-le-pere-eternel.md b/content/les-planches/planche-018-recto-le-pere-eternel.md
index f0c70bd..e73eac6 100644
--- a/content/les-planches/planche-018-recto-le-pere-eternel.md
+++ b/content/les-planches/planche-018-recto-le-pere-eternel.md
@@ -42,13 +42,15 @@ Sans commentaire.
 
 <div>
   <div style="float: left; width: 50%;">
-  <video width="320" height="240" controls>
+  <video width="320" height="240" controls
+    poster="{static}/images/thumbnails/video_18_1ere_partie.jpg">
     <source src="https://d1njpgd0ygatdn.cloudfront.net/video_18_1ere_partie.mp4" type="video/mp4">
   </video>
   </div>
 
   <div style="float: left; width: 50%;">
-  <video width="320" height="240" controls>
+  <video width="320" height="240" controls
+    poster="{static}/images/thumbnails/video_18_2eme_partie.jpg">
     <source src="https://d1njpgd0ygatdn.cloudfront.net/video_18_2eme_partie.mp4" type="video/mp4">
   </video>
   </div>
diff --git a/content/les-planches/planche-018-verso-dur-labeur.md b/content/les-planches/planche-018-verso-dur-labeur.md
index 16c7365..11819ab 100644
--- a/content/les-planches/planche-018-verso-dur-labeur.md
+++ b/content/les-planches/planche-018-verso-dur-labeur.md
@@ -51,13 +51,15 @@ météo et l'auteur.
 
 <div>
   <div style="float: left; width: 50%;">
-    <video width="320" height="240" controls>
+    <video width="320" height="240" controls
+      poster="{static}/images/thumbnails/video_18bis_1ere_partie.jpg">
       <source src="https://d1njpgd0ygatdn.cloudfront.net/video_18bis_1ere_partie.mp4" type="video/mp4">
     </video>
   </div>
 
   <div style="float: left; width: 50%;">
-    <video width="320" height="240" controls>
+    <video width="320" height="240" controls
+      poster="{static}/images/thumbnails/video_18bis_2eme_partie.jpg">
       <source src="https://d1njpgd0ygatdn.cloudfront.net/video_18bis_2eme_partie.mp4" type="video/mp4">
     </video>
   </div>
diff --git a/content/les-planches/planche-019-de-la-luzerne-au-juge.md b/content/les-planches/planche-019-de-la-luzerne-au-juge.md
index 2c6a221..b2a4468 100644
--- a/content/les-planches/planche-019-de-la-luzerne-au-juge.md
+++ b/content/les-planches/planche-019-de-la-luzerne-au-juge.md
@@ -41,6 +41,7 @@ d'une grossesse hors mariage. Le couvercle, la marmite et le rôti
 représentent ici les images métaphoriques d'un accouplement et d'une
 maternité.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_19.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_19.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-020-morfondiu.md b/content/les-planches/planche-020-morfondiu.md
index ca203c9..ac42934 100644
--- a/content/les-planches/planche-020-morfondiu.md
+++ b/content/les-planches/planche-020-morfondiu.md
@@ -31,6 +31,7 @@ Le Gène
 
 Une « jointe » correspond à une demi-journée de travail pour une bête de somme.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_20.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_20.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-021-le-poupon-dauphinois-s-accroche.html b/content/les-planches/planche-021-le-poupon-dauphinois-s-accroche.html
index a15fa12..136be96 100644
--- a/content/les-planches/planche-021-le-poupon-dauphinois-s-accroche.html
+++ b/content/les-planches/planche-021-le-poupon-dauphinois-s-accroche.html
@@ -56,7 +56,8 @@ <h2>Commentaire</h2>
 
     <div style="display: table; clear: both;"></div>
 
-    <video width="320" height="240" controls>
+    <video width="320" height="240" controls
+           poster="{static}/images/thumbnails/video_21.jpg">
       <source src="https://d1njpgd0ygatdn.cloudfront.net/video_21.mp4" type="video/mp4">
     </video>
   </body>
diff --git a/content/les-planches/planche-022-la-visite-de-l-eveque.md b/content/les-planches/planche-022-la-visite-de-l-eveque.md
index 4bfb1b1..3aa9458 100644
--- a/content/les-planches/planche-022-la-visite-de-l-eveque.md
+++ b/content/les-planches/planche-022-la-visite-de-l-eveque.md
@@ -60,6 +60,7 @@ Viriville. Ces cartes postales anciennes témoignent de cet évènement.
 </figure>
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_22.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_22.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-023-mais-cesse-de-rouspeter.md b/content/les-planches/planche-023-mais-cesse-de-rouspeter.md
index d4df43f..90d453f 100644
--- a/content/les-planches/planche-023-mais-cesse-de-rouspeter.md
+++ b/content/les-planches/planche-023-mais-cesse-de-rouspeter.md
@@ -47,6 +47,7 @@ Anecdote entendue au cours d'une « batteuse » ou d'une « mondée ». Il
 y est question d'une personne qui se plaignait sans cesse mais ne
 travaillait pas beaucoup.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_23-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_23-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-024-la-chasse-aux-becasses.md b/content/les-planches/planche-024-la-chasse-aux-becasses.md
index 89a11cb..e45e4ea 100644
--- a/content/les-planches/planche-024-la-chasse-aux-becasses.md
+++ b/content/les-planches/planche-024-la-chasse-aux-becasses.md
@@ -55,14 +55,7 @@ habitude de « broder » beaucoup autour des anecdotes dont il aimait
 régaler son auditoire. La traduction littérale de la phrase « Ne tappá
 pâ si fort te m'ébane » est « Ne tape pas si fort, tu m'écornes » !
 
-
-
-
-
-
-
-
-
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_24.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_24.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-025-des-merci-qui-tombent-comme-la-pluie.md b/content/les-planches/planche-025-des-merci-qui-tombent-comme-la-pluie.md
index 9bb4ad9..b0c7c03 100644
--- a/content/les-planches/planche-025-des-merci-qui-tombent-comme-la-pluie.md
+++ b/content/les-planches/planche-025-des-merci-qui-tombent-comme-la-pluie.md
@@ -47,13 +47,15 @@ chacun des deux textes.
 
 <div>
   <div style="float: left; width: 50%;">
-    <video width="320" height="240" controls>
+    <video width="320" height="240" controls
+      poster="{static}/images/thumbnails/video_25.jpg">
       <source src="https://d1njpgd0ygatdn.cloudfront.net/video_25.mp4" type="video/mp4">
     </video>
   </div>
 
   <div style="float: left; width: 50%;">
-    <video width="320" height="240" controls>
+    <video width="320" height="240" controls
+      poster="{static}/images/thumbnails/video_25_2eme_partie.jpg">
       <source src="https://d1njpgd0ygatdn.cloudfront.net/video_25_2eme_partie.mp4" type="video/mp4">
     </video>
   </div>
diff --git a/content/les-planches/planche-026-la-bonne-position.md b/content/les-planches/planche-026-la-bonne-position.md
index 2608cce..beb0173 100644
--- a/content/les-planches/planche-026-la-bonne-position.md
+++ b/content/les-planches/planche-026-la-bonne-position.md
@@ -36,7 +36,8 @@ Petite réflexion amusante de la part du fils d'un voisin rapportée à
 Eugène par celui qui l'aidait aux travaux de la ferme.
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_26.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_26.mp4" type="video/mp4">
 </video>
 
diff --git a/content/les-planches/planche-027-une-belle-reussite.md b/content/les-planches/planche-027-une-belle-reussite.md
index e3dfe3c..c1dd4db 100644
--- a/content/les-planches/planche-027-une-belle-reussite.md
+++ b/content/les-planches/planche-027-une-belle-reussite.md
@@ -37,6 +37,7 @@ Ce dialogue est une réponse à un agriculteur fier de sa réussite mais
 qui avait eu la chance au départ, d'hériter d'une belle ferme déjà
 bien installée.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_27.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_27.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-028-passe-donc-me-voir.md b/content/les-planches/planche-028-passe-donc-me-voir.md
index d762c06..fe8b6fd 100644
--- a/content/les-planches/planche-028-passe-donc-me-voir.md
+++ b/content/les-planches/planche-028-passe-donc-me-voir.md
@@ -29,6 +29,7 @@ Le Gène
 
 Entendue à la foire de La Côte-Saint-André.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_28.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_28.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-029-j-ai-tout-ce-qu-il-me-faut.md b/content/les-planches/planche-029-j-ai-tout-ce-qu-il-me-faut.md
index 396d785..73ee3c0 100644
--- a/content/les-planches/planche-029-j-ai-tout-ce-qu-il-me-faut.md
+++ b/content/les-planches/planche-029-j-ai-tout-ce-qu-il-me-faut.md
@@ -37,6 +37,7 @@ Le Gène
 Texte teinté d'ironie qui reflète bien les valeurs morales et la
 sagesse d'Eugène.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_29.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_29.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-030-petites-maximes-des-chambarans.md b/content/les-planches/planche-030-petites-maximes-des-chambarans.md
index b4838fa..60668f1 100644
--- a/content/les-planches/planche-030-petites-maximes-des-chambarans.md
+++ b/content/les-planches/planche-030-petites-maximes-des-chambarans.md
@@ -43,6 +43,7 @@ traits.</p>
 
 Trois petites maximes à la manière d'Eugène.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_30.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_30.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-031-recto-toutes-les-raisons-de-boire.md b/content/les-planches/planche-031-recto-toutes-les-raisons-de-boire.md
index 3b09e8b..3a9ecc4 100644
--- a/content/les-planches/planche-031-recto-toutes-les-raisons-de-boire.md
+++ b/content/les-planches/planche-031-recto-toutes-les-raisons-de-boire.md
@@ -37,6 +37,7 @@ Cette petite énumération édifiante a été rapportée à Eugène par un
 voisin originaire de Bourgogne. Les dernières raisons sont pleines de
 malicieux sous-entendus.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_31.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_31.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-031-verso-la-bardelle-et-les-amoureux.md b/content/les-planches/planche-031-verso-la-bardelle-et-les-amoureux.md
index 6ef3b2c..2ac1b49 100644
--- a/content/les-planches/planche-031-verso-la-bardelle-et-les-amoureux.md
+++ b/content/les-planches/planche-031-verso-la-bardelle-et-les-amoureux.md
@@ -49,6 +49,7 @@ atomique. Il n'y aurait plus personne sur terre ! »
 A noter, l'expression « vous qui voyez le ciel et la terre » pour nous
 laisser imaginer la position des amoureux.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_31bis.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_31bis.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-032-mettre-tout-le-monde-d-accord.md b/content/les-planches/planche-032-mettre-tout-le-monde-d-accord.md
index 5f93c62..c66155c 100644
--- a/content/les-planches/planche-032-mettre-tout-le-monde-d-accord.md
+++ b/content/les-planches/planche-032-mettre-tout-le-monde-d-accord.md
@@ -79,13 +79,15 @@ discrètement pour se mettre en sécurité.
 
 <div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_32.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_32.mp4" type="video/mp4">
 </video>
 </div>
 
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_32bis.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_32bis.mp4" type="video/mp4">
 </video>
 </div>
diff --git a/content/les-planches/planche-033-recto-et-verso-le-vieux-et-le-jeune.md b/content/les-planches/planche-033-recto-et-verso-le-vieux-et-le-jeune.md
index c92051f..9127190 100644
--- a/content/les-planches/planche-033-recto-et-verso-le-vieux-et-le-jeune.md
+++ b/content/les-planches/planche-033-recto-et-verso-le-vieux-et-le-jeune.md
@@ -63,10 +63,12 @@ Père Eternel est comme moi, trop vieux, il ne sait plus ce qu'il
 cherche) se disait assez fréquemment…  et se retrouve sur plusieurs
 planches.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_33.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_33.mp4" type="video/mp4">
 </video>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_33bis.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_33bis.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-034-un-bon-troc.md b/content/les-planches/planche-034-un-bon-troc.md
index 965d4fc..f424c83 100644
--- a/content/les-planches/planche-034-un-bon-troc.md
+++ b/content/les-planches/planche-034-un-bon-troc.md
@@ -38,6 +38,7 @@ Plaisanterie sur les « chèvres à grande queue ».
 Louis était un voisin d'Eugène, bien connu à Viriville sous le
 sobriquet de « Grand Louis ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_34.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_34.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-035-les-defauts-de-la-bardelle.md b/content/les-planches/planche-035-les-defauts-de-la-bardelle.md
index 767ed0d..b64a072 100644
--- a/content/les-planches/planche-035-les-defauts-de-la-bardelle.md
+++ b/content/les-planches/planche-035-les-defauts-de-la-bardelle.md
@@ -47,6 +47,7 @@ Une bardelle est une vache de deux couleurs.
 Eugène s'est souvenu de ce dialogue entre lui-même et un maquignon,
 réputé pour son redoutable talent de négociateur.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_35-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_35-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-036-la-politique.md b/content/les-planches/planche-036-la-politique.md
index d3fcd3f..c863550 100644
--- a/content/les-planches/planche-036-la-politique.md
+++ b/content/les-planches/planche-036-la-politique.md
@@ -44,6 +44,7 @@ Le point d'interrogation doit plutôt être compris comme un point
 d'exclamation. Mais il est surtout plus agréable à Eugène de graver
 une jolie courbe (?) qu'un petit trait bien droit (!).
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_36.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_36.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-037-dans-la-lune.md b/content/les-planches/planche-037-dans-la-lune.md
index a4ffee4..7c6d78c 100644
--- a/content/les-planches/planche-037-dans-la-lune.md
+++ b/content/les-planches/planche-037-dans-la-lune.md
@@ -40,6 +40,7 @@ phrase fut prononcée par un des voisins d'Eugène venu l'aider pour la
 construction de sa stabulation.
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_37.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_37.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-038-le-juste-milieu.md b/content/les-planches/planche-038-le-juste-milieu.md
index 7d08f98..1ab49be 100644
--- a/content/les-planches/planche-038-le-juste-milieu.md
+++ b/content/les-planches/planche-038-le-juste-milieu.md
@@ -43,6 +43,7 @@ Le Gène
 ## Sans commentaire
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_38.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_38.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-039-les-4-temps.md b/content/les-planches/planche-039-les-4-temps.md
index 6cb6f39..4baf979 100644
--- a/content/les-planches/planche-039-les-4-temps.md
+++ b/content/les-planches/planche-039-les-4-temps.md
@@ -39,6 +39,7 @@ de saison.  Charbonnier était le surnom donné à un M. Charpenay, au
 physique très reconnaissable (il était petit et trapu), qui avait
 exercé cette profession.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_39-3.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_39-3.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-040-le-loup-qui-pete.md b/content/les-planches/planche-040-le-loup-qui-pete.md
index a4c2a22..1036232 100644
--- a/content/les-planches/planche-040-le-loup-qui-pete.md
+++ b/content/les-planches/planche-040-le-loup-qui-pete.md
@@ -34,6 +34,7 @@ encore rien vu, toi qui crois déjà tout connaître ! ».
   <figcaption style="max-width: 340px">Le loup qui pète sur la pierre de bois</figcaption>
 </figure>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_40_2_-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_40_2_-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-041-grosses-comme-des-courges.md b/content/les-planches/planche-041-grosses-comme-des-courges.md
index 7a2d6cd..3253125 100644
--- a/content/les-planches/planche-041-grosses-comme-des-courges.md
+++ b/content/les-planches/planche-041-grosses-comme-des-courges.md
@@ -53,6 +53,7 @@ Le deuxième texte signifie : « Si tu te retournes sans cesse sur tes
 problèmes pour évaluer comment tu te sens, tu vas finir par vraiment
 tomber malade ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_41.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_41.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-042-plutot-le-cheval-que-moi.md b/content/les-planches/planche-042-plutot-le-cheval-que-moi.md
index 86750b9..aca2cd0 100644
--- a/content/les-planches/planche-042-plutot-le-cheval-que-moi.md
+++ b/content/les-planches/planche-042-plutot-le-cheval-que-moi.md
@@ -46,6 +46,7 @@ eu du mal à s'habituer à cet engin : il leur arrivait de crier
 faisaient avec le cheval et il n'était pas rare de les voir défoncer
 les clôtures.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_42.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_42.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-043-une-pie-dans-la-soupe.md b/content/les-planches/planche-043-une-pie-dans-la-soupe.md
index bff8f94..3ab9a58 100644
--- a/content/les-planches/planche-043-une-pie-dans-la-soupe.md
+++ b/content/les-planches/planche-043-une-pie-dans-la-soupe.md
@@ -39,7 +39,8 @@ Planche inspirée par un voisin, « raconteur d'anecdotes » qui aimait
 bien utiliser l'hyperbole pour amuser ses compères.
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_43_2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_43_2.mp4" type="video/mp4">
 </video>
 
diff --git a/content/les-planches/planche-044-la-chasse.md b/content/les-planches/planche-044-la-chasse.md
index 2a8f88d..0458870 100644
--- a/content/les-planches/planche-044-la-chasse.md
+++ b/content/les-planches/planche-044-la-chasse.md
@@ -32,6 +32,7 @@ Le Gène
 Il s'agit ici, essentiellement, de graver les noms patois des oiseaux
 (corneille, pie et geai) pour les sauvegarder.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_44.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_44.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-045-les-lievres-du-pirote.md b/content/les-planches/planche-045-les-lievres-du-pirote.md
index 36c12ae..1493ff3 100644
--- a/content/les-planches/planche-045-les-lievres-du-pirote.md
+++ b/content/les-planches/planche-045-les-lievres-du-pirote.md
@@ -58,10 +58,12 @@ ami, « raconteur d'histoires » de Marnans, bien connu pour son
 aptitude à l'extrapolation.
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_45.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_45.mp4" type="video/mp4">
 </video>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_45fin_avec_commentaire-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_45fin_avec_commentaire-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-046-le-roi-de-la-basse-cour.md b/content/les-planches/planche-046-le-roi-de-la-basse-cour.md
index c3371c8..cdcbd49 100644
--- a/content/les-planches/planche-046-le-roi-de-la-basse-cour.md
+++ b/content/les-planches/planche-046-le-roi-de-la-basse-cour.md
@@ -52,6 +52,7 @@ humiliation (par exemple, une fille engrossée hors mariage ou un fils
 qui a fait une bêtise) tout le monde se met alors à médire de lui, « à
 lui casser du sucre sur la tête ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_46.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_46.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-047-rien-ne-sert-de-courir.md b/content/les-planches/planche-047-rien-ne-sert-de-courir.md
index 5668b4a..fc1d2b3 100644
--- a/content/les-planches/planche-047-rien-ne-sert-de-courir.md
+++ b/content/les-planches/planche-047-rien-ne-sert-de-courir.md
@@ -62,6 +62,7 @@ là, une litanie que répétait souvent sa mère (cf. [planche
 174]({filename}/les-planches/planche-174-tout-va-trop-mal.md)).
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_47.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_47.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-048-la-meilleure-place.md b/content/les-planches/planche-048-la-meilleure-place.md
index 6ea5aa6..af91a22 100644
--- a/content/les-planches/planche-048-la-meilleure-place.md
+++ b/content/les-planches/planche-048-la-meilleure-place.md
@@ -39,7 +39,8 @@ Petite phrase entendue plusieurs fois au cours des repas de
 « batteuse » en 1969, au moment où des hommes ont marché pour la
 première fois sur la lune.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_48-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_48-2.mp4" type="video/mp4">
 </video>
 
diff --git a/content/les-planches/planche-049-brava-lize.md b/content/les-planches/planche-049-brava-lize.md
index 11e32ca..ea56fa9 100644
--- a/content/les-planches/planche-049-brava-lize.md
+++ b/content/les-planches/planche-049-brava-lize.md
@@ -52,6 +52,7 @@ Le dernier des mots qui reprend la finale homophone « asse » et dont
 la première partie est remplacée par un point d'interrogation évoque
 pudiquement l'habitude de « courir après les filles ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_49.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_49.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-050-la-mondee.md b/content/les-planches/planche-050-la-mondee.md
index 21223b8..a052b1a 100644
--- a/content/les-planches/planche-050-la-mondee.md
+++ b/content/les-planches/planche-050-la-mondee.md
@@ -42,6 +42,7 @@ Ce petit dialogue a été rapporté à Eugène par sa mère qui l'avait
 entendu lorsqu'elle était petite. La cruche derrière Joseph est censée
 récupérer l'huile des noix !
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_50.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_50.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-051-essuie-tes-galoches-avant-d-entrer.md b/content/les-planches/planche-051-essuie-tes-galoches-avant-d-entrer.md
index 75ec15b..fdfa0e3 100644
--- a/content/les-planches/planche-051-essuie-tes-galoches-avant-d-entrer.md
+++ b/content/les-planches/planche-051-essuie-tes-galoches-avant-d-entrer.md
@@ -33,6 +33,7 @@ Chez lui, on ne reçoit pas n'importe qui !
 Ces galoches proviennent de la collection d'Eugène dénichée dans les
 brocantes de la région.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_51.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_51.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-052-l-accident-de-velo.md b/content/les-planches/planche-052-l-accident-de-velo.md
index b2166ac..d40fb16 100644
--- a/content/les-planches/planche-052-l-accident-de-velo.md
+++ b/content/les-planches/planche-052-l-accident-de-velo.md
@@ -57,6 +57,7 @@ Cette histoire est véridique et a été racontée par une voisine.
 « L'ensso » est une pente assez raide, la « Poya » est un lieu-dit de
 la commune de Viriville.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_52.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_52.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-053-l-heure-du-loup.md b/content/les-planches/planche-053-l-heure-du-loup.md
index a9fa072..f8c675b 100644
--- a/content/les-planches/planche-053-l-heure-du-loup.md
+++ b/content/les-planches/planche-053-l-heure-du-loup.md
@@ -50,6 +50,7 @@ proviennent de l'expression « entre chien et loup » qui correspond au
 crépuscule, quand la lumière déclinant, on ne peut plus distinguer un
 chien d'un loup.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_53.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_53.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-054-travailler-pour-aider.md b/content/les-planches/planche-054-travailler-pour-aider.md
index 6ebbe15..246c8a3 100644
--- a/content/les-planches/planche-054-travailler-pour-aider.md
+++ b/content/les-planches/planche-054-travailler-pour-aider.md
@@ -31,6 +31,7 @@ Le Gène
 
 Morale pleine de bon sens.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_54.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_54.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-055-trans-gene-hic.md b/content/les-planches/planche-055-trans-gene-hic.md
index c522c2a..8432551 100644
--- a/content/les-planches/planche-055-trans-gene-hic.md
+++ b/content/les-planches/planche-055-trans-gene-hic.md
@@ -37,6 +37,7 @@ Eugène avait accroché cette petite planche au dessus des fraises qu'il avait r
 
 Ces fraises provenaient au départ d'une petite variété sauvage qui poussait dans les vignes (les fraises blanches de St Pierre) et qui s'était croisée naturellement avec celle du jardin.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_55-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_55-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-056-lou-zane-que-non-jame-ren-fa.md b/content/les-planches/planche-056-lou-zane-que-non-jame-ren-fa.md
index 84ad1a5..ea35345 100644
--- a/content/les-planches/planche-056-lou-zane-que-non-jame-ren-fa.md
+++ b/content/les-planches/planche-056-lou-zane-que-non-jame-ren-fa.md
@@ -40,6 +40,7 @@ laquelle il avait été injustement remis en question par d'autres
 participants. Il traduit ainsi son sentiment que ceux qui en font le
 moins sont souvent les premiers à critiquer.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_56.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_56.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-057-le-travail-c-est-la-sante.md b/content/les-planches/planche-057-le-travail-c-est-la-sante.md
index 7ab669c..91f3bb5 100644
--- a/content/les-planches/planche-057-le-travail-c-est-la-sante.md
+++ b/content/les-planches/planche-057-le-travail-c-est-la-sante.md
@@ -35,6 +35,7 @@ Le Gène
 Dicton assez couramment répété, sans doute inspiré par une chanson
 d'Henri Salvador, alors en vogue : « Le travail c'est la santé ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_57.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_57.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-058-a-hue-et-a-dia.md b/content/les-planches/planche-058-a-hue-et-a-dia.md
index 1245055..2fa4be4 100644
--- a/content/les-planches/planche-058-a-hue-et-a-dia.md
+++ b/content/les-planches/planche-058-a-hue-et-a-dia.md
@@ -50,6 +50,7 @@ Le Gène
 
 Réflexion entendue et reproduite telle quelle par Eugène.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_58-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_58-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-059-le-pape.md b/content/les-planches/planche-059-le-pape.md
index 9fe51b6..840c4e2 100644
--- a/content/les-planches/planche-059-le-pape.md
+++ b/content/les-planches/planche-059-le-pape.md
@@ -55,6 +55,7 @@ Il savait aussi se montrer très patient et même très rusé en affaire
 pour vendre ou acheter toujours à son avantage.
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_59.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_59.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-060-recto-et-verso-du-bon-sens.md b/content/les-planches/planche-060-recto-et-verso-du-bon-sens.md
index 2c35ed8..cc105b5 100644
--- a/content/les-planches/planche-060-recto-et-verso-du-bon-sens.md
+++ b/content/les-planches/planche-060-recto-et-verso-du-bon-sens.md
@@ -58,10 +58,12 @@ sagesse ».
 
 Eugène s'amuse en signant cette face double !
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_60.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_60.mp4" type="video/mp4">
 </video>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_60bis.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_60bis.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-061-les-fromentaux-des-coteaux.md b/content/les-planches/planche-061-les-fromentaux-des-coteaux.md
index d168437..7c4e100 100644
--- a/content/les-planches/planche-061-les-fromentaux-des-coteaux.md
+++ b/content/les-planches/planche-061-les-fromentaux-des-coteaux.md
@@ -57,10 +57,12 @@ Dans ces dialogues savoureux, aux assertions pleines de sérieux et de
 fierté répondent des assertions moqueuses sous forme d'images
 hyperboliques.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_61debut_avec_com.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_61debut_avec_com.mp4" type="video/mp4">
 </video>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_61fin_ok.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_61fin_ok.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-062-petit-poisson.md b/content/les-planches/planche-062-petit-poisson.md
index 96350d5..7872605 100644
--- a/content/les-planches/planche-062-petit-poisson.md
+++ b/content/les-planches/planche-062-petit-poisson.md
@@ -36,6 +36,7 @@ Eugène évoque là un ancien voisin du quartier des Bouilleaux que l'on
 trouvait un peu simplet mais qui savait se révéler pourtant très malin
 et très efficace dans la négociation des prix.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_62.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_62.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-063-ne-t-inquiete-pas-il-en-reste.md b/content/les-planches/planche-063-ne-t-inquiete-pas-il-en-reste.md
index 309cd38..ddcadf6 100644
--- a/content/les-planches/planche-063-ne-t-inquiete-pas-il-en-reste.md
+++ b/content/les-planches/planche-063-ne-t-inquiete-pas-il-en-reste.md
@@ -39,6 +39,7 @@ aux visiteurs citadins.
   <figcaption style="max-width: 320px">les vaches et les veaux en alpages</figcaption>
 </figure>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_63.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_63.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-064-recto-enterrement-clandestin.md b/content/les-planches/planche-064-recto-enterrement-clandestin.md
index 08e7eee..2438b57 100644
--- a/content/les-planches/planche-064-recto-enterrement-clandestin.md
+++ b/content/les-planches/planche-064-recto-enterrement-clandestin.md
@@ -59,10 +59,12 @@ Une « Piana » est une terre argilo-calcaire très fertile mais très
 dure à labourer. On ne peut donc que la travailler « piano »
 (lentement).
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_64debut-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_64debut-2.mp4" type="video/mp4">
 </video>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_64fin-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_64fin-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-064-verso-chasse-de-nuit.md b/content/les-planches/planche-064-verso-chasse-de-nuit.md
index bff05a1..e486297 100644
--- a/content/les-planches/planche-064-verso-chasse-de-nuit.md
+++ b/content/les-planches/planche-064-verso-chasse-de-nuit.md
@@ -45,6 +45,7 @@ braconnage.
 Eugène évoque là, un vieil habitant très respecté à Viriville que l'on
 surnommait « le Valet ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_64bis_2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_64bis_2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-065-contrarietes.md b/content/les-planches/planche-065-contrarietes.md
index 90c393b..c06b47d 100644
--- a/content/les-planches/planche-065-contrarietes.md
+++ b/content/les-planches/planche-065-contrarietes.md
@@ -46,6 +46,7 @@ travaillent dur, mais parfois se rebellent…
 Dans le second texte, Eugène s'amuse de la mauvaise foi d'un chasseur
 maladroit.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_65.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_65.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-065-verso-la-chasse-aux-subventions.md b/content/les-planches/planche-065-verso-la-chasse-aux-subventions.md
index 5aeb367..be2de6f 100644
--- a/content/les-planches/planche-065-verso-la-chasse-aux-subventions.md
+++ b/content/les-planches/planche-065-verso-la-chasse-aux-subventions.md
@@ -35,6 +35,7 @@ Eugène a été longtemps conseiller municipal à Viriville. Il nous donne
 là, à sa façon, la recette d'une tactique sans doute bien rodée pour
 obtenir des subventions pour la commune.
 
-<video width="320" height="240" controls> 
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_65bis.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_65bis.mp4" type="video/mp4"> 
 </video>
diff --git a/content/les-planches/planche-066-quand-les-temps-sont-difficiles.md b/content/les-planches/planche-066-quand-les-temps-sont-difficiles.md
index ca25e4b..26bf9b0 100644
--- a/content/les-planches/planche-066-quand-les-temps-sont-difficiles.md
+++ b/content/les-planches/planche-066-quand-les-temps-sont-difficiles.md
@@ -36,6 +36,7 @@ Il s'agit bien sûr d'une métaphore qui évoque essentiellement dans
 l'esprit d'Eugène, la période de l'occupation lors de la seconde
 guerre mondiale et les profiteurs de guerre.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_66.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_66.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-067-quel-bazar-ici.md b/content/les-planches/planche-067-quel-bazar-ici.md
index eac344d..26582f9 100644
--- a/content/les-planches/planche-067-quel-bazar-ici.md
+++ b/content/les-planches/planche-067-quel-bazar-ici.md
@@ -30,6 +30,7 @@ avait été un peu choquée par l'état de la cuisine d'Eugène, alors que
 celui-ci était trop accaparé par la réparation d'une machine pour
 faire correctement le ménage dans sa maison.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_67.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_67.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-068-rayonne-comme-le-soleil.md b/content/les-planches/planche-068-rayonne-comme-le-soleil.md
index 012b8e0..030a1c1 100644
--- a/content/les-planches/planche-068-rayonne-comme-le-soleil.md
+++ b/content/les-planches/planche-068-rayonne-comme-le-soleil.md
@@ -53,6 +53,7 @@ petite maxime qui invite à l'optimisme.
   <figcaption style="max-width: 324px"></figcaption>
 </figure>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_68.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_68.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-069-retour-de-la-vogue.md b/content/les-planches/planche-069-retour-de-la-vogue.md
index 7f58b50..bde0548 100644
--- a/content/les-planches/planche-069-retour-de-la-vogue.md
+++ b/content/les-planches/planche-069-retour-de-la-vogue.md
@@ -61,10 +61,12 @@ Le second narre la rencontre sur le chemin des Bouilleaux, entre
 Eugène et un promeneur à cheval à l'allure un peu trop hautaine pour
 espérer échapper à la moquerie !
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_69debut.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_69debut.mp4" type="video/mp4">
 </video>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_69fin.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_69fin.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-070-raza-pigna-chara-et-para.md b/content/les-planches/planche-070-raza-pigna-chara-et-para.md
index c15d937..a1fc696 100644
--- a/content/les-planches/planche-070-raza-pigna-chara-et-para.md
+++ b/content/les-planches/planche-070-raza-pigna-chara-et-para.md
@@ -62,6 +62,7 @@ soient pas complétement oubliés !
 
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_70.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_70.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-071-ce-qui-compte-dans-la-vie.md b/content/les-planches/planche-071-ce-qui-compte-dans-la-vie.md
index d646de2..5b26e2e 100644
--- a/content/les-planches/planche-071-ce-qui-compte-dans-la-vie.md
+++ b/content/les-planches/planche-071-ce-qui-compte-dans-la-vie.md
@@ -50,6 +50,7 @@ Le Gène
 
 Le quatrièmement fait bien sûr référence à la sexualité.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_71.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_71.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-072-retour-d-ecole-en-chanson.md b/content/les-planches/planche-072-retour-d-ecole-en-chanson.md
index 8885fcd..c76cf2a 100644
--- a/content/les-planches/planche-072-retour-d-ecole-en-chanson.md
+++ b/content/les-planches/planche-072-retour-d-ecole-en-chanson.md
@@ -46,6 +46,7 @@ de Roybon à pied.
 Le « cuzon » est un endroit où on entreposait les fagots derrière la
 cheminée.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_72chantee.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_72chantee.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-073-2-petits-dictons.md b/content/les-planches/planche-073-2-petits-dictons.md
index 0fdad6e..35646ae 100644
--- a/content/les-planches/planche-073-2-petits-dictons.md
+++ b/content/les-planches/planche-073-2-petits-dictons.md
@@ -38,6 +38,7 @@ plaignent beaucoup ne sont pas forcément autant en danger qu'ils le
 croient et/ou le disent. On pouvait dire dans les mêmes
 circonstances : « Ça lui passera ! » ou « Ce n'est pas si grave ! ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_73.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_73.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-074-le-karnio.md b/content/les-planches/planche-074-le-karnio.md
index 4229d37..d9f59d8 100644
--- a/content/les-planches/planche-074-le-karnio.md
+++ b/content/les-planches/planche-074-le-karnio.md
@@ -41,6 +41,7 @@ toute l'année.
 
 C'est lui-même à 20 ans qu'Eugène décrit ainsi.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_74.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_74.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-075-il-pleut-c-est-ainsi.md b/content/les-planches/planche-075-il-pleut-c-est-ainsi.md
index 881035c..d454435 100644
--- a/content/les-planches/planche-075-il-pleut-c-est-ainsi.md
+++ b/content/les-planches/planche-075-il-pleut-c-est-ainsi.md
@@ -46,6 +46,7 @@ d'Eugène disait parfois. Cela n'a pas de signification très précise
 mais exprime une certaine forme de fatalisme qu'Eugène traduit par
 « C'est comme ça ! » ou « Comme ci, comme ça ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_75.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_75.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-076-nonante-un-bon-prix.md b/content/les-planches/planche-076-nonante-un-bon-prix.md
index d38b565..08a3d5a 100644
--- a/content/les-planches/planche-076-nonante-un-bon-prix.md
+++ b/content/les-planches/planche-076-nonante-un-bon-prix.md
@@ -85,12 +85,14 @@ Un « russe » fait allusion aux emprunts russes jamais remboursés aux
 
 <div>
 <div  style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_76_1ere_partie.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_76_1ere_partie.mp4" type="video/mp4">
 </video>
 </div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_76_2eme_partie.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_76_2eme_partie.mp4" type="video/mp4">
 </video>
 </div>
diff --git a/content/les-planches/planche-077-des-quoailles-comme-des-gobilles.md b/content/les-planches/planche-077-des-quoailles-comme-des-gobilles.md
index 8aa738d..cdf8986 100644
--- a/content/les-planches/planche-077-des-quoailles-comme-des-gobilles.md
+++ b/content/les-planches/planche-077-des-quoailles-comme-des-gobilles.md
@@ -46,6 +46,7 @@ Ce texte est un dialogue entre deux paysans, relevé lors d'une année
 de grande sécheresse avec pour conséquence la petite taille des
 légumes du potager.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_77.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_77.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-078-les-enormes-quouailles-de-la-melanie.md b/content/les-planches/planche-078-les-enormes-quouailles-de-la-melanie.md
index feb771e..7d3872a 100644
--- a/content/les-planches/planche-078-les-enormes-quouailles-de-la-melanie.md
+++ b/content/les-planches/planche-078-les-enormes-quouailles-de-la-melanie.md
@@ -42,6 +42,7 @@ d'Eugène et bien connu pour son imagination, son sens de la répartie
 et de l'hyperbole.
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_78.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_78.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-079-deux-sages-resolutions.md b/content/les-planches/planche-079-deux-sages-resolutions.md
index 9a362cc..fba3ffc 100644
--- a/content/les-planches/planche-079-deux-sages-resolutions.md
+++ b/content/les-planches/planche-079-deux-sages-resolutions.md
@@ -40,6 +40,7 @@ La deuxième réflexion, pleine de bon sens, pourrait correspondre à :
 t'acharnes sur quelqu'un qui est déjà très malheureux, tu vas
 l'achever ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_79.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_79.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-080-ni-queue-ni-tete.md b/content/les-planches/planche-080-ni-queue-ni-tete.md
index 29b2a77..c29d85d 100644
--- a/content/les-planches/planche-080-ni-queue-ni-tete.md
+++ b/content/les-planches/planche-080-ni-queue-ni-tete.md
@@ -39,6 +39,7 @@ Le Gène
 La forme si particulière de cette planche a induit l'écriture de ces
 deux expressions très courantes qu'Eugène a rassemblées.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_80.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_80.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-081-bete-de-somme.md b/content/les-planches/planche-081-bete-de-somme.md
index 88c6558..d3758d9 100644
--- a/content/les-planches/planche-081-bete-de-somme.md
+++ b/content/les-planches/planche-081-bete-de-somme.md
@@ -51,6 +51,7 @@ chaîne qui tire le « coutrier », c'est à dire la charrue.
 
 Tout cela pour atteler le pauvre Joseph devant sa charrue !
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_81.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_81.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-082-tete-a-cul-tete-a-queue.md b/content/les-planches/planche-082-tete-a-cul-tete-a-queue.md
index a3705c0..52d3864 100644
--- a/content/les-planches/planche-082-tete-a-cul-tete-a-queue.md
+++ b/content/les-planches/planche-082-tete-a-cul-tete-a-queue.md
@@ -32,6 +32,7 @@ Le Gène
 
 Expression courante pour exprimer que tout est « sens dessus dessous ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_82.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_82.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-083-voleur-de-houx-premiere-partie.md b/content/les-planches/planche-083-voleur-de-houx-premiere-partie.md
index 5f44207..1477133 100644
--- a/content/les-planches/planche-083-voleur-de-houx-premiere-partie.md
+++ b/content/les-planches/planche-083-voleur-de-houx-premiere-partie.md
@@ -49,6 +49,7 @@ qu'Eugène a gravé avec un soin tout particulier cette planche et la
 [planche
 175]({filename}/les-planches/planche-175-voleur-de-houx-seconde-partie.md).
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_83.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_83.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-084-janvier-au-tison.md b/content/les-planches/planche-084-janvier-au-tison.md
index 422e1df..700eaad 100644
--- a/content/les-planches/planche-084-janvier-au-tison.md
+++ b/content/les-planches/planche-084-janvier-au-tison.md
@@ -54,6 +54,7 @@ Cette planche reprend un des dictons des Chambarans permettant de
 prévoir empiriquement le temps.  Plus sobrement : « Si il fait soleil
 en janvier mais froid en février, alors le printemps sera tardif ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_84.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_84.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-085-les-papillons-volages.md b/content/les-planches/planche-085-les-papillons-volages.md
index 0de1a0b..7c4a28e 100644
--- a/content/les-planches/planche-085-les-papillons-volages.md
+++ b/content/les-planches/planche-085-les-papillons-volages.md
@@ -49,6 +49,7 @@ printemps, il l'avait alors trouvée séduisante.
   <figcaption style="max-width: 300px">Papillons volages</figcaption>
 </figure>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_85.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_85.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-086-le-soleil-brille-pour-tous.md b/content/les-planches/planche-086-le-soleil-brille-pour-tous.md
index 5f41fb2..6663349 100644
--- a/content/les-planches/planche-086-le-soleil-brille-pour-tous.md
+++ b/content/les-planches/planche-086-le-soleil-brille-pour-tous.md
@@ -41,6 +41,7 @@ C'est la forme de la planche offerte par un ami, qui a inspiré ce
 texte optimiste et généreux.
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_86.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_86.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-087-poiriers-pruniers-pailles-et-cardons.md b/content/les-planches/planche-087-poiriers-pruniers-pailles-et-cardons.md
index 1d722e4..0446283 100644
--- a/content/les-planches/planche-087-poiriers-pruniers-pailles-et-cardons.md
+++ b/content/les-planches/planche-087-poiriers-pruniers-pailles-et-cardons.md
@@ -58,6 +58,7 @@ des fruits puis celui d'une chèvre. À gauche, est gravé le nombre
 - Les « pailles et des cardons » donnent l'image des jambes toutes
   blanches que l'on redécouvre au début du printemps.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_87.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_87.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-088-la-verite.md b/content/les-planches/planche-088-la-verite.md
index 9675c1a..dae836b 100644
--- a/content/les-planches/planche-088-la-verite.md
+++ b/content/les-planches/planche-088-la-verite.md
@@ -37,6 +37,7 @@ surprise par les propos provocants de ce voisin.
   <figcaption style="max-width: 354px">Essais d&#x27;écriture</figcaption>
 </figure>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_88.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_88.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-089-le-karnio-des-chambarans.md b/content/les-planches/planche-089-le-karnio-des-chambarans.md
index 359a5d4..95366f5 100644
--- a/content/les-planches/planche-089-le-karnio-des-chambarans.md
+++ b/content/les-planches/planche-089-le-karnio-des-chambarans.md
@@ -48,6 +48,7 @@ constituait leur principale nourriture.
 « Brâmafan » ou « brame-la-faim » est un terme suffisamment explicite
 et imagé.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_89.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_89.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-090-ceux-qui-n-ont-plus-de-tete.md b/content/les-planches/planche-090-ceux-qui-n-ont-plus-de-tete.md
index e2973fe..de9bee1 100644
--- a/content/les-planches/planche-090-ceux-qui-n-ont-plus-de-tete.md
+++ b/content/les-planches/planche-090-ceux-qui-n-ont-plus-de-tete.md
@@ -40,6 +40,7 @@ Le Gène
 
 « Couper la tête » de quelqu'un signifie ici « dire du mal » de lui.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_90.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_90.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-091-he-monsieur-le-maire.md b/content/les-planches/planche-091-he-monsieur-le-maire.md
index 2218161..f48214b 100644
--- a/content/les-planches/planche-091-he-monsieur-le-maire.md
+++ b/content/les-planches/planche-091-he-monsieur-le-maire.md
@@ -46,6 +46,7 @@ Cette planche reprend le texte d'une autre, offerte à l'un des maires
 de Viriville nouvellement élu. Eugène a lui-même été conseiller
 municipal durant quatre mandatures.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_91.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_91.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-092-faut-laisser-murir.md b/content/les-planches/planche-092-faut-laisser-murir.md
index 8bdef24..67f6c0c 100644
--- a/content/les-planches/planche-092-faut-laisser-murir.md
+++ b/content/les-planches/planche-092-faut-laisser-murir.md
@@ -37,6 +37,7 @@ le texte était la retranscription exacte des phrases en patois
 entendues autrefois, sans apport personnel. Eugène n'osait pas encore
 y inclure des dessins.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_92.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_92.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-093-degourdi-comme-une-poule-avec-un-couteau.md b/content/les-planches/planche-093-degourdi-comme-une-poule-avec-un-couteau.md
index 8316b5b..6be7362 100644
--- a/content/les-planches/planche-093-degourdi-comme-une-poule-avec-un-couteau.md
+++ b/content/les-planches/planche-093-degourdi-comme-une-poule-avec-un-couteau.md
@@ -45,6 +45,7 @@ Le Gène
 Expressions couramment employées par les « anciens » agacés par les
 maladresses des jeunes apprentis.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_93.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_93.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-094-le-plus-beau-des-boucs.md b/content/les-planches/planche-094-le-plus-beau-des-boucs.md
index d93fef6..11a145c 100644
--- a/content/les-planches/planche-094-le-plus-beau-des-boucs.md
+++ b/content/les-planches/planche-094-le-plus-beau-des-boucs.md
@@ -32,6 +32,7 @@ Le Gène
 Pour Eugène, cette observation s'applique bien sûr aux hommes et aux
 femmes tout autant qu'aux caprins.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_94.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_94.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-095-un-bon-couteau-pour-couper-mon-pain.md b/content/les-planches/planche-095-un-bon-couteau-pour-couper-mon-pain.md
index 3eccaab..76dd8c3 100644
--- a/content/les-planches/planche-095-un-bon-couteau-pour-couper-mon-pain.md
+++ b/content/les-planches/planche-095-un-bon-couteau-pour-couper-mon-pain.md
@@ -44,6 +44,7 @@ mourir. Allusion à la « pétafine » qui est un fromage du Dauphiné,
 souvent très fort, élaboré essentiellement à partir de vieux restes de
 fromages et d'eau de vie.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_95_2_.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_95_2_.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-096-le-charivari.md b/content/les-planches/planche-096-le-charivari.md
index 02030ce..3ca7758 100644
--- a/content/les-planches/planche-096-le-charivari.md
+++ b/content/les-planches/planche-096-le-charivari.md
@@ -41,6 +41,7 @@ récupérer.
 Eugène s'amuse avec la musicalité des mots « bôje en bòche » (la ruche
 en paille).
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_96.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_96.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-097-le-coq-est-lache.md b/content/les-planches/planche-097-le-coq-est-lache.md
index 11d2baf..e552996 100644
--- a/content/les-planches/planche-097-le-coq-est-lache.md
+++ b/content/les-planches/planche-097-le-coq-est-lache.md
@@ -45,6 +45,7 @@ alpage au col de la Bataille.
   <figcaption style="max-width: 300px">Le coq…</figcaption>
 </figure>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_97.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_97.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-098-le-prix-de-la-terre.md b/content/les-planches/planche-098-le-prix-de-la-terre.md
index 1d62f88..2928e25 100644
--- a/content/les-planches/planche-098-le-prix-de-la-terre.md
+++ b/content/les-planches/planche-098-le-prix-de-la-terre.md
@@ -41,6 +41,7 @@ spéculation.
 D'autre part, il vaut mieux cultiver de bonnes relations de voisinage
 que d'essayer de réaliser une trop bonne affaire.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_98.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_98.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-099-des-sous-encore-des-sous.md b/content/les-planches/planche-099-des-sous-encore-des-sous.md
index 341b852..6927e75 100644
--- a/content/les-planches/planche-099-des-sous-encore-des-sous.md
+++ b/content/les-planches/planche-099-des-sous-encore-des-sous.md
@@ -60,12 +60,14 @@ vieux qu'elle.
 
 <div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_99.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_99.mp4" type="video/mp4">
 </video>
 </div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_99_bis.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_99_bis.mp4" type="video/mp4">
 </video>
 </div>
diff --git a/content/les-planches/planche-100-tu-travailles-encore-sous-la-pluie.md b/content/les-planches/planche-100-tu-travailles-encore-sous-la-pluie.md
index a9a3b6e..00ca515 100644
--- a/content/les-planches/planche-100-tu-travailles-encore-sous-la-pluie.md
+++ b/content/les-planches/planche-100-tu-travailles-encore-sous-la-pluie.md
@@ -32,6 +32,7 @@ Réflexion entendue et notée lors de la rencontre avec un agriculteur
 qui piochait avec ardeur pour terminer sa raie de betteraves malgré la
 pluie.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_100.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_100.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-101-un-coeur-d-artichaut.md b/content/les-planches/planche-101-un-coeur-d-artichaut.md
index a30edcf..2008ae4 100644
--- a/content/les-planches/planche-101-un-coeur-d-artichaut.md
+++ b/content/les-planches/planche-101-un-coeur-d-artichaut.md
@@ -65,13 +65,15 @@ visage de la femme.
 
 <div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_101_h1.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_101_h1.mp4" type="video/mp4">
 </video>
 </div>
 <div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_101de_2_a_fin.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_101de_2_a_fin.mp4" type="video/mp4">
 </video>
 </div>
diff --git a/content/les-planches/planche-102-entre-bons-amis.md b/content/les-planches/planche-102-entre-bons-amis.md
index e875eef..7e9813f 100644
--- a/content/les-planches/planche-102-entre-bons-amis.md
+++ b/content/les-planches/planche-102-entre-bons-amis.md
@@ -59,6 +59,7 @@ métaphores que l'on pourrait traduire par les équivalents : « on ne se
 cache rien entre amis » et « informe toi avant de décider quoique se
 soit ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_102.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_102.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-103-tout-sens-dessus-dessous.md b/content/les-planches/planche-103-tout-sens-dessus-dessous.md
index d642832..3b0b858 100644
--- a/content/les-planches/planche-103-tout-sens-dessus-dessous.md
+++ b/content/les-planches/planche-103-tout-sens-dessus-dessous.md
@@ -29,6 +29,7 @@ soleil, c'est tout sens dessus dessous !
 L'expression bien imagée « tô â la renverse » correspond à « sens
 dessus dessous » ou plus familièrement « c'est n'importe quoi ! ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_103.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_103.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-104-loup-y-est-tu.md b/content/les-planches/planche-104-loup-y-est-tu.md
index 5b8745e..977f15d 100644
--- a/content/les-planches/planche-104-loup-y-est-tu.md
+++ b/content/les-planches/planche-104-loup-y-est-tu.md
@@ -46,6 +46,7 @@ C'est après avoir vu à la télévision, Ségolène Royale, alors candidate
 jouant sur les deux sens du mot « loup ». Ségolène Royale participait
 alors à une fête costumée et portait ce fameux masque sur les yeux.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_104.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_104.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-105-c-est-le-printemps.md b/content/les-planches/planche-105-c-est-le-printemps.md
index 3a395bd..c6af83c 100644
--- a/content/les-planches/planche-105-c-est-le-printemps.md
+++ b/content/les-planches/planche-105-c-est-le-printemps.md
@@ -58,6 +58,7 @@ printemps.
 Les « buïsonnna » correspondent à un ensemble de buissons et le
 « Kézon » à une haie très épaisse.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_105-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_105-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-107-etre-beni-ou-pas.md b/content/les-planches/planche-107-etre-beni-ou-pas.md
index 208d2df..9d2c848 100644
--- a/content/les-planches/planche-107-etre-beni-ou-pas.md
+++ b/content/les-planches/planche-107-etre-beni-ou-pas.md
@@ -64,6 +64,7 @@ Cet orage de grêle de 1939, pour Eugène, est resté le souvenir
 particulièrement traumatisant d'un événement dramatique pour sa
 famille et ses voisins.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_107.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_107.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-108-il-y-a-toujours-quelque-chose-a-prendre-dans-les-coteaux.md b/content/les-planches/planche-108-il-y-a-toujours-quelque-chose-a-prendre-dans-les-coteaux.md
index b960f7e..2b96ded 100644
--- a/content/les-planches/planche-108-il-y-a-toujours-quelque-chose-a-prendre-dans-les-coteaux.md
+++ b/content/les-planches/planche-108-il-y-a-toujours-quelque-chose-a-prendre-dans-les-coteaux.md
@@ -41,6 +41,7 @@ mais il ne l'a pas gardée et l'a remplacée par celle-ci pour ne pas
 risquer de blesser ceux qui auraient pu se sentir concernés.
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_108.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_108.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-109-aaaaaamen.md b/content/les-planches/planche-109-aaaaaamen.md
index 749e903..1e3117a 100644
--- a/content/les-planches/planche-109-aaaaaamen.md
+++ b/content/les-planches/planche-109-aaaaaamen.md
@@ -31,6 +31,7 @@ Le Gène
 
 Jeu de mots un peu sarcastique entre « Amen » et « amène ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_109-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_109-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-110-pompette-comme-un-pompier.md b/content/les-planches/planche-110-pompette-comme-un-pompier.md
index 6a6f421..376f45a 100644
--- a/content/les-planches/planche-110-pompette-comme-un-pompier.md
+++ b/content/les-planches/planche-110-pompette-comme-un-pompier.md
@@ -54,6 +54,7 @@ Eugène choisit souvent des prénoms très courants comme Marie ici (ou
 Joseph ailleurs par exemple) pour ne pas dévoiler l'identité de la
 personne concernée.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_110.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_110.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-111-j-ai-dechire-mon-pantalon.md b/content/les-planches/planche-111-j-ai-dechire-mon-pantalon.md
index cb3ca68..45cf75f 100644
--- a/content/les-planches/planche-111-j-ai-dechire-mon-pantalon.md
+++ b/content/les-planches/planche-111-j-ai-dechire-mon-pantalon.md
@@ -32,6 +32,7 @@ avec leur musicalité : « braille » (pantalons), « dépenaille »
 (déchirer, partir en lambeaux), « Chatraille » (petit rapiéçage,
 raccommodage rapide).
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_111.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_111.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-112-allez-courage.md b/content/les-planches/planche-112-allez-courage.md
index 219c144..6cb2a8c 100644
--- a/content/les-planches/planche-112-allez-courage.md
+++ b/content/les-planches/planche-112-allez-courage.md
@@ -38,6 +38,7 @@ Le Gène
 
 Sans commentaires !
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_112-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_112-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-113-l-espoir.md b/content/les-planches/planche-113-l-espoir.md
index 80dced3..a8c3a3a 100644
--- a/content/les-planches/planche-113-l-espoir.md
+++ b/content/les-planches/planche-113-l-espoir.md
@@ -52,6 +52,7 @@ l'espoir d'une vie meilleure… jamais gagnée. Les conseilleurs qui sont
 rarement les payeurs présentent toujours les investissements comme des
 perspectives d'enrichissement. Promesses le plus souvent déçues.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_113.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_113.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-114-joseph-bat-la-breloque.md b/content/les-planches/planche-114-joseph-bat-la-breloque.md
index 7f4f836..bac6c6b 100644
--- a/content/les-planches/planche-114-joseph-bat-la-breloque.md
+++ b/content/les-planches/planche-114-joseph-bat-la-breloque.md
@@ -59,6 +59,7 @@ chaînes de montre ; il peut ainsi être assimilé à une montre à gousset.
 « perdre la tête », déraisonner, avoir le cerveau détraqué comme une
 vieille pendule.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_114.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_114.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-115-facheuses-consequences.md b/content/les-planches/planche-115-facheuses-consequences.md
index 81e10ef..6285641 100644
--- a/content/les-planches/planche-115-facheuses-consequences.md
+++ b/content/les-planches/planche-115-facheuses-consequences.md
@@ -65,6 +65,7 @@ dans tous les cas s'en lave les mains !
 « L'andain » est une bande continue de fourrage laissée sur le sol
 après la fauche.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_115.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_115.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-116-laissez-donc-les-jonquilles.md b/content/les-planches/planche-116-laissez-donc-les-jonquilles.md
index 88250b4..cfbcfd8 100644
--- a/content/les-planches/planche-116-laissez-donc-les-jonquilles.md
+++ b/content/les-planches/planche-116-laissez-donc-les-jonquilles.md
@@ -37,6 +37,7 @@ d'autre, grâce à Eugène le chemin des Bouilleaux.
 Les « cornards » sont les « cocus » auxquels est habituellement associée
 la couleur jaune.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_116.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_116.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-117-planche-118-la-modestie-des-chasseurs.md b/content/les-planches/planche-117-planche-118-la-modestie-des-chasseurs.md
index aa97052..ec2bde6 100644
--- a/content/les-planches/planche-117-planche-118-la-modestie-des-chasseurs.md
+++ b/content/les-planches/planche-117-planche-118-la-modestie-des-chasseurs.md
@@ -39,10 +39,12 @@ que <u>20</u> faisans, <u>15</u> perdrix, <u>10</u> bécasses et <u>5
 Ces planches forment un ensemble illustrant avec ironie un imaginaire
 dialogue entre un chasseur et un autre, sans doute Eugène.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_117.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_117.mp4" type="video/mp4">
 </video>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_118_.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_118_.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-119-le-second-mois-de-l-an.md b/content/les-planches/planche-119-le-second-mois-de-l-an.md
index 522b6e0..4e186ed 100644
--- a/content/les-planches/planche-119-le-second-mois-de-l-an.md
+++ b/content/les-planches/planche-119-le-second-mois-de-l-an.md
@@ -39,6 +39,7 @@ Le Gène
 Eugène décrit de manière imagée le temps et la forme de la lune juste
 avant une période de pleine lune.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_119.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_119.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-120-faire-son-trou.md b/content/les-planches/planche-120-faire-son-trou.md
index 8e632cb..9d4b15a 100644
--- a/content/les-planches/planche-120-faire-son-trou.md
+++ b/content/les-planches/planche-120-faire-son-trou.md
@@ -38,6 +38,7 @@ Ce vilebrequin fait partie de la collection d'outils agricoles
 d'Eugène. C'est lui qui l'a inspiré pour mettre en forme cette petite
 sentence éducative.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_120.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_120.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-121-chez-joseph.md b/content/les-planches/planche-121-chez-joseph.md
index 90f781c..e005b30 100644
--- a/content/les-planches/planche-121-chez-joseph.md
+++ b/content/les-planches/planche-121-chez-joseph.md
@@ -34,6 +34,7 @@ Les « truffes » sont des pommes de terre. Ce que l'on appelait
 « l'ordienère » était la bonne cuisine simple et variée de tous les
 jours. Ce terme n'était pas péjoratif, au contraire.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_121.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_121.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-122-les-outils-du-diable.md b/content/les-planches/planche-122-les-outils-du-diable.md
index 2f7cdc1..5cf0ee6 100644
--- a/content/les-planches/planche-122-les-outils-du-diable.md
+++ b/content/les-planches/planche-122-les-outils-du-diable.md
@@ -39,6 +39,7 @@ permet à Eugène d'exposer quelques uns de ses vieux outils. Le texte
 s'en inspire et s'en amuse. Sacré diable qui vous pousse sans cesse à
 travailler !!!
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_122.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_122.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-123-l-irrigateur-moitie-gaspi.md b/content/les-planches/planche-123-l-irrigateur-moitie-gaspi.md
index 8f208c8..fc082e5 100644
--- a/content/les-planches/planche-123-l-irrigateur-moitie-gaspi.md
+++ b/content/les-planches/planche-123-l-irrigateur-moitie-gaspi.md
@@ -44,6 +44,7 @@ Quant au « canton de Montrou », tracé à côté du trou dans le bois, il
 s'agit d'une plaisanterie évoquant la partie du corps concernée par
 l'instrument…
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_123.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_123.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-124-avoir-du-piston.md b/content/les-planches/planche-124-avoir-du-piston.md
index 2d42cca..7c49565 100644
--- a/content/les-planches/planche-124-avoir-du-piston.md
+++ b/content/les-planches/planche-124-avoir-du-piston.md
@@ -40,6 +40,7 @@ En ce qui concerne le « cor à pompe », ici, la pompe désigne le piston
 de l'instrument. Jeu de mots avec le cor aux pieds et les « pompes »
 désignant des chaussures en langage familier.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_124.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_124.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-125-ma-boule.md b/content/les-planches/planche-125-ma-boule.md
index 566b835..9166433 100644
--- a/content/les-planches/planche-125-ma-boule.md
+++ b/content/les-planches/planche-125-ma-boule.md
@@ -34,6 +34,7 @@ Le Gène
 Jeux de mots avec le mot « faucille » à la place de « faut-il? » et de
 la boule fixées sur la planche.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_125.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_125.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-126-une-vie-cabossee.md b/content/les-planches/planche-126-une-vie-cabossee.md
index 00cdfe8..6988ddc 100644
--- a/content/les-planches/planche-126-une-vie-cabossee.md
+++ b/content/les-planches/planche-126-une-vie-cabossee.md
@@ -38,6 +38,7 @@ Comme pour d'autres planches, le texte est inspiré par l'instrument
 déniché dans cet état dans une brocante.
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_126.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_126.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-127-mmmm-les-bonnes-tommes.md b/content/les-planches/planche-127-mmmm-les-bonnes-tommes.md
index 78959cb..a900494 100644
--- a/content/les-planches/planche-127-mmmm-les-bonnes-tommes.md
+++ b/content/les-planches/planche-127-mmmm-les-bonnes-tommes.md
@@ -40,6 +40,7 @@ Que veux-tu de plus ?
 Cette planche très particulière est l'une des premières réalisées par
 Eugène.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_127-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_127-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-128-bon-pour-tous.md b/content/les-planches/planche-128-bon-pour-tous.md
index 1d9640b..53d19dd 100644
--- a/content/les-planches/planche-128-bon-pour-tous.md
+++ b/content/les-planches/planche-128-bon-pour-tous.md
@@ -37,6 +37,7 @@ Ces clystères étaient utilisés pour les animaux, d'où leurs tailles
 différentes. Ils font partie de la collection d'objets ruraux anciens
 d'Eugène. Ceux-ci lui ont inspiré cette planche amusante.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_128.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_128.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-129-les-cupelettes.md b/content/les-planches/planche-129-les-cupelettes.md
index c26dae7..186de17 100644
--- a/content/les-planches/planche-129-les-cupelettes.md
+++ b/content/les-planches/planche-129-les-cupelettes.md
@@ -68,10 +68,12 @@ des régionalismes qui perdent leur précision dans la traduction.
 L'expression courante « avoir trop chargé la mule » est une métaphore
 pour désigner un excès de consommation d'alcool.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_129recto.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_129recto.mp4" type="video/mp4">
 </video>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_129verso.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_129verso.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-130-le-herisson-du-regiment.md b/content/les-planches/planche-130-le-herisson-du-regiment.md
index c8e8994..a29d4c2 100644
--- a/content/les-planches/planche-130-le-herisson-du-regiment.md
+++ b/content/les-planches/planche-130-le-herisson-du-regiment.md
@@ -34,6 +34,7 @@ l'on a du mal à sortir sans douleur de sa poche !
 Les « officiers » et Les « caporaux » sont ici les billets de banque
 et les « simples soldats », les pièces de monnaie.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_130.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_130.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-131-a-la-chasse-un-lapin-farceur.md b/content/les-planches/planche-131-a-la-chasse-un-lapin-farceur.md
index 5205295..1a274c0 100644
--- a/content/les-planches/planche-131-a-la-chasse-un-lapin-farceur.md
+++ b/content/les-planches/planche-131-a-la-chasse-un-lapin-farceur.md
@@ -47,6 +47,7 @@ Histoire racontée par un voisin et un peu transformée.
 La « Caraborne » est un trou profond dans le tronc d'un châtaignier
 que les lapins aiment utiliser comme terrier.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_131.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_131.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-132-recto-et-verso-le-toine.md b/content/les-planches/planche-132-recto-et-verso-le-toine.md
index 4bc5b5d..5a3a0bd 100644
--- a/content/les-planches/planche-132-recto-et-verso-le-toine.md
+++ b/content/les-planches/planche-132-recto-et-verso-le-toine.md
@@ -73,12 +73,14 @@ distance habituels, il en a toutefois gravé une planche !
 
 <div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_132-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_132-2.mp4" type="video/mp4">
 </video>
 </div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_132bis-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_132bis-2.mp4" type="video/mp4">
 </video>
 </div>
diff --git a/content/les-planches/planche-133-les-idees-noires-d-un-cul-terreux.md b/content/les-planches/planche-133-les-idees-noires-d-un-cul-terreux.md
index 02d1c95..84d5628 100644
--- a/content/les-planches/planche-133-les-idees-noires-d-un-cul-terreux.md
+++ b/content/les-planches/planche-133-les-idees-noires-d-un-cul-terreux.md
@@ -55,6 +55,7 @@ mauvaise humeur, pensive, mélancolique et brassant des idées
 noires. La « niar » signifie un peu la même chose mais avec la notion
 de colère et de révolte en plus.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_133.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_133.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-134-recto-jo-son-ane-et-les-gendarmes.md b/content/les-planches/planche-134-recto-jo-son-ane-et-les-gendarmes.md
index 4b05ac4..2a6ca42 100644
--- a/content/les-planches/planche-134-recto-jo-son-ane-et-les-gendarmes.md
+++ b/content/les-planches/planche-134-recto-jo-son-ane-et-les-gendarmes.md
@@ -47,6 +47,7 @@ Le Gène
 
 Eugène relate ici une anecdote vécue telle qu'elle lui a été racontée.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_134.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_134.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-134-verso-une-retraite-a-faire-pleurer.md b/content/les-planches/planche-134-verso-une-retraite-a-faire-pleurer.md
index 5886b64..0f1aa8a 100644
--- a/content/les-planches/planche-134-verso-une-retraite-a-faire-pleurer.md
+++ b/content/les-planches/planche-134-verso-une-retraite-a-faire-pleurer.md
@@ -60,6 +60,7 @@ Eugène signe « trois fois » pour chacune des trois historiettes, la
 première se trouvant sur la première face de la planche.
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_134bis.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_134bis.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-135-il-a-la-broge.md b/content/les-planches/planche-135-il-a-la-broge.md
index 36835ba..f91c615 100644
--- a/content/les-planches/planche-135-il-a-la-broge.md
+++ b/content/les-planches/planche-135-il-a-la-broge.md
@@ -39,6 +39,7 @@ Le « javanais » symbolisait un langage étranger incompréhensible et le
 « Javanère » est, en conséquence, le pays des inventions un peu folles
 et d'une imagination débridée.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_135-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_135-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-136-sacree-melanie.md b/content/les-planches/planche-136-sacree-melanie.md
index 9a2bba9..6e76337 100644
--- a/content/les-planches/planche-136-sacree-melanie.md
+++ b/content/les-planches/planche-136-sacree-melanie.md
@@ -48,6 +48,7 @@ cette dame de Marnans.
 est bien sûr à prendre dans son sens de chance, rencontre heureuse et
 succès amoureux.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_136.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_136.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-137-du-pain-du-roti-et-de-la-tomme.md b/content/les-planches/planche-137-du-pain-du-roti-et-de-la-tomme.md
index 282513f..1c67036 100644
--- a/content/les-planches/planche-137-du-pain-du-roti-et-de-la-tomme.md
+++ b/content/les-planches/planche-137-du-pain-du-roti-et-de-la-tomme.md
@@ -47,6 +47,7 @@ Le verbe « galocher » vient bien sûr du mot « galoches », chaussures à
 semelles de bois. Il signifie : « lever le pied et montrer le bout de
 ses galoches pour tenir un animal en respect ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_137.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_137.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-138-la-jolie-lune.md b/content/les-planches/planche-138-la-jolie-lune.md
index add0651..fc872f7 100644
--- a/content/les-planches/planche-138-la-jolie-lune.md
+++ b/content/les-planches/planche-138-la-jolie-lune.md
@@ -38,6 +38,7 @@ Eugène s'amuse avec le double sens des mots « lune » et « bise ». Il
 nous livre ainsi avec malice, un dicton local qui traduit la
 connaissance empirique des données météorologiques des Chambarans.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_138.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_138.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-139-les-subventions.md b/content/les-planches/planche-139-les-subventions.md
index 5d045e0..0e9a750 100644
--- a/content/les-planches/planche-139-les-subventions.md
+++ b/content/les-planches/planche-139-les-subventions.md
@@ -37,6 +37,7 @@ Le Gène
 L'argent mentionné ici correspond aux subventions attribuées aux
 cultivateurs victimes de catastrophes naturelles.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_139.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_139.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-140-profites-en-bien.md b/content/les-planches/planche-140-profites-en-bien.md
index 2c9ed3a..9f0c0a9 100644
--- a/content/les-planches/planche-140-profites-en-bien.md
+++ b/content/les-planches/planche-140-profites-en-bien.md
@@ -51,6 +51,7 @@ par le dessin d'une queue contre le côté gauche, la tête d'oiseau
 contre le bord droit et le « crochet » du bas pouvant figurer les
 pattes.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_140.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_140.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-141-les-beaux-jours.md b/content/les-planches/planche-141-les-beaux-jours.md
index 8110acf..47de5c3 100644
--- a/content/les-planches/planche-141-les-beaux-jours.md
+++ b/content/les-planches/planche-141-les-beaux-jours.md
@@ -35,6 +35,7 @@ Dicton reprenant une connaissance empirique des fluctuations du temps
 dans les Chambarans. Eugène extrapole pour le mettre en parallèle avec
 la météo des relations amoureuses.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_141.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_141.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-142-trop-plein.md b/content/les-planches/planche-142-trop-plein.md
index f0d0e10..2b08ae7 100644
--- a/content/les-planches/planche-142-trop-plein.md
+++ b/content/les-planches/planche-142-trop-plein.md
@@ -42,6 +42,7 @@ Eugène a gravé cette planche après la visite chez lui, tôt le matin,
 d'un petit groupe de jeunes bien éméchés après avoir fait la fête
 toute la nuit.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_142.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_142.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-143-un-bon-macon.md b/content/les-planches/planche-143-un-bon-macon.md
index 8cbbe8c..a219e48 100644
--- a/content/les-planches/planche-143-un-bon-macon.md
+++ b/content/les-planches/planche-143-un-bon-macon.md
@@ -33,6 +33,7 @@ construire les murs en pisé et en galets. Son expression favorite
 était « Milliards de Dieu » que Eugène a remplacé par un autre juron
 « Misère de foutre » pour ne pas risquer le blasphème !
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_143.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_143.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-144-brrr.md b/content/les-planches/planche-144-brrr.md
index 66c5cb6..8951eaf 100644
--- a/content/les-planches/planche-144-brrr.md
+++ b/content/les-planches/planche-144-brrr.md
@@ -36,6 +36,7 @@ Le « Patron des mal habillés » désigne le soleil qui sait réchauffer
 les pauvres gens trop peu vêtus. Expression reprise sur de nombreuses
 planches.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_144.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_144.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-145-le-matin-c-est-la-marie-qui-empeche-joseph-de-se-lever.md b/content/les-planches/planche-145-le-matin-c-est-la-marie-qui-empeche-joseph-de-se-lever.md
index 85d2c42..bca675d 100644
--- a/content/les-planches/planche-145-le-matin-c-est-la-marie-qui-empeche-joseph-de-se-lever.md
+++ b/content/les-planches/planche-145-le-matin-c-est-la-marie-qui-empeche-joseph-de-se-lever.md
@@ -49,6 +49,7 @@ Le Gène
 
 Petit texte coquin autour du mot « pantillon ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_145.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_145.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-146-le-bon-moment.md b/content/les-planches/planche-146-le-bon-moment.md
index 9293b3c..ffb182f 100644
--- a/content/les-planches/planche-146-le-bon-moment.md
+++ b/content/les-planches/planche-146-le-bon-moment.md
@@ -33,6 +33,7 @@ du syndicat agricole très connu à l'époque (Fréjus Michon) qui l'a
 énoncée à Eugène. Les agriculteurs subissaient alors une longue
 période de pluie.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_146.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_146.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-147-pigeons-pigeonnes.md b/content/les-planches/planche-147-pigeons-pigeonnes.md
index a21f3eb..4e41be6 100644
--- a/content/les-planches/planche-147-pigeons-pigeonnes.md
+++ b/content/les-planches/planche-147-pigeons-pigeonnes.md
@@ -38,6 +38,7 @@ tout le travail et dirige la maison.
   <figcaption style="max-width: 380px"></figcaption>
 </figure>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_147.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_147.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-148-savoir-ou-pas.md b/content/les-planches/planche-148-savoir-ou-pas.md
index 2a53328..3e7ed8b 100644
--- a/content/les-planches/planche-148-savoir-ou-pas.md
+++ b/content/les-planches/planche-148-savoir-ou-pas.md
@@ -28,6 +28,7 @@ Le Gène
 
 Petite phrase complexe à méditer comme un jeu de mots et d'esprit.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_148.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_148.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-149-a-la-saint-medard.md b/content/les-planches/planche-149-a-la-saint-medard.md
index b5d89ee..249f448 100644
--- a/content/les-planches/planche-149-a-la-saint-medard.md
+++ b/content/les-planches/planche-149-a-la-saint-medard.md
@@ -35,6 +35,7 @@ Petite variation à partir du dicton : « S'il pleut à la Saint Médard,
 il pleut quarante jours plus tard, à moins que Saint Barnabé ne vienne
 tout arranger ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_149.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_149.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-150-recto-et-verso-gene-tu-deviens-kankane.md b/content/les-planches/planche-150-recto-et-verso-gene-tu-deviens-kankane.md
index 43b08d7..552d7e2 100644
--- a/content/les-planches/planche-150-recto-et-verso-gene-tu-deviens-kankane.md
+++ b/content/les-planches/planche-150-recto-et-verso-gene-tu-deviens-kankane.md
@@ -60,12 +60,14 @@ qu'ils ne soient pas oubliés.
 
 <div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_150.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_150.mp4" type="video/mp4">
 </video>
 </div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_150bis.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_150bis.mp4" type="video/mp4">
 </video>
 </div>
diff --git a/content/les-planches/planche-151-l-habitude-de-rien.md b/content/les-planches/planche-151-l-habitude-de-rien.md
index e539354..45183de 100644
--- a/content/les-planches/planche-151-l-habitude-de-rien.md
+++ b/content/les-planches/planche-151-l-habitude-de-rien.md
@@ -33,6 +33,7 @@ depuis longtemps, bien habitué !
 Petite réflexion un peu narquoise dont l'humour malicieux efface le
 cynisme.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_151-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_151-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-152-dur-travail.md b/content/les-planches/planche-152-dur-travail.md
index 9554cc6..f19d9ef 100644
--- a/content/les-planches/planche-152-dur-travail.md
+++ b/content/les-planches/planche-152-dur-travail.md
@@ -93,12 +93,14 @@ un trait.</p>
 
 <div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_152t1_et_t2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_152t1_et_t2.mp4" type="video/mp4">
 </video>
 </div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_152t3_et_t4.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_152t3_et_t4.mp4" type="video/mp4">
 </video>
 </div>
@@ -108,12 +110,14 @@ un trait.</p>
 
 <div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_152t5_et_t6.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_152t5_et_t6.mp4" type="video/mp4">
 </video>
 </div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_152t7.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_152t7.mp4" type="video/mp4">
 </video>
 </div>
@@ -121,6 +125,7 @@ un trait.</p>
 
 <div style="display: table; clear: both;"></div>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_152t8_.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_152t8_.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-153-dur-travail.md b/content/les-planches/planche-153-dur-travail.md
index d545ea0..a59dc55 100644
--- a/content/les-planches/planche-153-dur-travail.md
+++ b/content/les-planches/planche-153-dur-travail.md
@@ -96,12 +96,14 @@ pas encore ajouter des dessins.
 
 <div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_153_h1_h2_h3-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_153_h1_h2_h3-2.mp4" type="video/mp4">
 </video>
 </div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_153_h4-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_153_h4-2.mp4" type="video/mp4">
 </video>
 </div>
@@ -111,12 +113,14 @@ pas encore ajouter des dessins.
 
 <div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_153_h5_h6-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_153_h5_h6-2.mp4" type="video/mp4">
 </video>
 </div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_153_h7-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_153_h7-2.mp4" type="video/mp4">
 </video>
 </div>
diff --git a/content/les-planches/planche-154-c-est-dans-les-vieilles-marmites.md b/content/les-planches/planche-154-c-est-dans-les-vieilles-marmites.md
index 934530b..608995b 100644
--- a/content/les-planches/planche-154-c-est-dans-les-vieilles-marmites.md
+++ b/content/les-planches/planche-154-c-est-dans-les-vieilles-marmites.md
@@ -65,6 +65,7 @@ qu'ils ne soient pas définitivement oubliés.
   <figcaption style="max-width: 380px"></figcaption>
 </figure>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_154.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_154.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-155-pour-bien-voir-regarde-a-cote.md b/content/les-planches/planche-155-pour-bien-voir-regarde-a-cote.md
index 96ca12c..822c52e 100644
--- a/content/les-planches/planche-155-pour-bien-voir-regarde-a-cote.md
+++ b/content/les-planches/planche-155-pour-bien-voir-regarde-a-cote.md
@@ -67,12 +67,14 @@ manière imagée un avis plutôt badin.
 
 <div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_155recto.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_155recto.mp4" type="video/mp4">
 </video>
 </div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_155verso.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_155verso.mp4" type="video/mp4">
 </video>
 </div>
diff --git a/content/les-planches/planche-156-autour-de-ton-nombril.md b/content/les-planches/planche-156-autour-de-ton-nombril.md
index 72ea767..4e58fb3 100644
--- a/content/les-planches/planche-156-autour-de-ton-nombril.md
+++ b/content/les-planches/planche-156-autour-de-ton-nombril.md
@@ -59,6 +59,7 @@ Le Gène
 Est-ce la découpe originale ou la position du nœud dans le bois qui a
 inspiré Eugène ???
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_156.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_156.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-157-ils-sont-beaux-nos-coteaux.md b/content/les-planches/planche-157-ils-sont-beaux-nos-coteaux.md
index 8d77c13..7d04778 100644
--- a/content/les-planches/planche-157-ils-sont-beaux-nos-coteaux.md
+++ b/content/les-planches/planche-157-ils-sont-beaux-nos-coteaux.md
@@ -38,7 +38,8 @@ mère. C'est un agriculteur des coteaux de St Marcellin qui s'était
 exprimé ainsi, alors que le côté sud des Chambarans, où se situe le
 quartier des Bouilleaux est encore plus difficile à cultiver.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_157.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_157.mp4" type="video/mp4">
 </video>
 
diff --git a/content/les-planches/planche-158-apres-la-pluie-le-beau-temps.md b/content/les-planches/planche-158-apres-la-pluie-le-beau-temps.md
index 7c027a4..eabd653 100644
--- a/content/les-planches/planche-158-apres-la-pluie-le-beau-temps.md
+++ b/content/les-planches/planche-158-apres-la-pluie-le-beau-temps.md
@@ -52,6 +52,7 @@ sur la planche en se souvenant des moments et des personnes disparus.
 « Fo sié pe n’émouchillé ién » (il faudra être 6 pour écarter les
 mouches) était une phrase souvent utilisée pour commenter le temps.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_158.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_158.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-159-la-betise-des-hommes.md b/content/les-planches/planche-159-la-betise-des-hommes.md
index d499a75..fb50b4e 100644
--- a/content/les-planches/planche-159-la-betise-des-hommes.md
+++ b/content/les-planches/planche-159-la-betise-des-hommes.md
@@ -77,12 +77,14 @@ activité.
 
 <div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_159recto.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_159recto.mp4" type="video/mp4">
 </video>
 </div>
 <div style="float: left; width: 50%;">
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_159verso.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_159verso.mp4" type="video/mp4">
 </video>
 </div>
diff --git a/content/les-planches/planche-160-mon-couteau.md b/content/les-planches/planche-160-mon-couteau.md
index c62655a..787e33c 100644
--- a/content/les-planches/planche-160-mon-couteau.md
+++ b/content/les-planches/planche-160-mon-couteau.md
@@ -41,6 +41,7 @@ couteau mal aiguisé. Ce petit dialogue est un bon exemple des petites
 plaisanteries échangées au cours des regroupements entre voisins et
 membres de la même famille pour les travaux agricoles.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_160.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_160.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-161-les-sous.md b/content/les-planches/planche-161-les-sous.md
index 69d045a..edd8a7c 100644
--- a/content/les-planches/planche-161-les-sous.md
+++ b/content/les-planches/planche-161-les-sous.md
@@ -30,6 +30,7 @@ Le Gène
 
 Sentence pleine de bon sens.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_161.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_161.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-163-aider-son-prochain.md b/content/les-planches/planche-163-aider-son-prochain.md
index f7a4ac7..bed0392 100644
--- a/content/les-planches/planche-163-aider-son-prochain.md
+++ b/content/les-planches/planche-163-aider-son-prochain.md
@@ -39,6 +39,7 @@ ne pas se moquer des autres.
 Il est certes toujours plus valorisant d'aider un riche. Aider un
 « pauvre bougre » est (était ?) plus « ordinaire ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_163.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_163.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-164-le-museau-plein-de-plumes.md b/content/les-planches/planche-164-le-museau-plein-de-plumes.md
index e1df5ad..1f8bed5 100644
--- a/content/les-planches/planche-164-le-museau-plein-de-plumes.md
+++ b/content/les-planches/planche-164-le-museau-plein-de-plumes.md
@@ -48,6 +48,7 @@ Comme sur chaque planche, les lettres initiales des mots Renâ, Le et
 Plûmou sont gravées en majuscules pour le seul plaisir de tracer des
 belles courbes.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_164-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_164-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-165-la-grande-cuillere.md b/content/les-planches/planche-165-la-grande-cuillere.md
index 73761eb..c70df56 100644
--- a/content/les-planches/planche-165-la-grande-cuillere.md
+++ b/content/les-planches/planche-165-la-grande-cuillere.md
@@ -77,10 +77,12 @@ loin ».  C'est la forme de la planche qui a inspiré Eugène pour ces
 petits textes ainsi que le désir de conserver comme sur la plupart des
 planches, certaines expressions et mots en patois.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_165.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_165.mp4" type="video/mp4">
 </video>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_165bis.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_165bis.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-166-le-tavelo.md b/content/les-planches/planche-166-le-tavelo.md
index fafed62..14a9de5 100644
--- a/content/les-planches/planche-166-le-tavelo.md
+++ b/content/les-planches/planche-166-le-tavelo.md
@@ -38,6 +38,7 @@ Jeu de mots en patois entre « tàvelle » équivalent de
 en bois comme celle qu'Eugène a suspendue sous cette planche en forme
 de tête.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_166.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_166.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-167-bon-fioquere.md b/content/les-planches/planche-167-bon-fioquere.md
index 24d356c..c9ebfb4 100644
--- a/content/les-planches/planche-167-bon-fioquere.md
+++ b/content/les-planches/planche-167-bon-fioquere.md
@@ -44,6 +44,7 @@ et s'en prit à Eugène qui n'y était pour rien. Les termes de cette
 invective injuste, Eugène en sourit encore, comme s'ils avaient été
 prononcés hier.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_167.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_167.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-168-ca-te-fait-une-belle-jambe.md b/content/les-planches/planche-168-ca-te-fait-une-belle-jambe.md
index 4bb98ea..d0c790c 100644
--- a/content/les-planches/planche-168-ca-te-fait-une-belle-jambe.md
+++ b/content/les-planches/planche-168-ca-te-fait-une-belle-jambe.md
@@ -58,6 +58,7 @@ contexte de séduction amoureuse.
 et pas trop naïf ! ».
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_168.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_168.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-169-syndicaliste-mais-celibataire.md b/content/les-planches/planche-169-syndicaliste-mais-celibataire.md
index 78087c1..d20bdec 100644
--- a/content/les-planches/planche-169-syndicaliste-mais-celibataire.md
+++ b/content/les-planches/planche-169-syndicaliste-mais-celibataire.md
@@ -39,6 +39,7 @@ lui où il vivait avec sa mère. La réflexion d'un de ses amis à ce
 propos, lui a inspiré cette planche et ce jeu de mots entre les
 homophones « mère » et « mer ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_169.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_169.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-170-les-riches-et-les-politiciens.md b/content/les-planches/planche-170-les-riches-et-les-politiciens.md
index 6a44117..0eeab6f 100644
--- a/content/les-planches/planche-170-les-riches-et-les-politiciens.md
+++ b/content/les-planches/planche-170-les-riches-et-les-politiciens.md
@@ -49,6 +49,7 @@ Deux petites sentences, autrefois, souvent énoncées par la mère
 d'Eugène. « A la bade » se disait à propos du bétail laissé libre,
 sans gardien de troupeau.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_170.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_170.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-171-assis-sous-son-chene.md b/content/les-planches/planche-171-assis-sous-son-chene.md
index 2a099b9..ba1fa96 100644
--- a/content/les-planches/planche-171-assis-sous-son-chene.md
+++ b/content/les-planches/planche-171-assis-sous-son-chene.md
@@ -42,6 +42,7 @@ assis, toujours sur la même souche d'arbre, son seul effort consistant
 
 <div style="display: table; clear: both;"></div>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_171-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_171-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-173-de-feneraille-a-semaille.md b/content/les-planches/planche-173-de-feneraille-a-semaille.md
index 43a9992..393a75f 100644
--- a/content/les-planches/planche-173-de-feneraille-a-semaille.md
+++ b/content/les-planches/planche-173-de-feneraille-a-semaille.md
@@ -38,6 +38,7 @@ travaux des champs.
 Eugène a pris plaisir ici à graver de belles majuscules cursives,
 comme il aime tant le faire.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_173.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_173.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-174-tout-va-trop-mal.md b/content/les-planches/planche-174-tout-va-trop-mal.md
index 63e87e4..6009c48 100644
--- a/content/les-planches/planche-174-tout-va-trop-mal.md
+++ b/content/les-planches/planche-174-tout-va-trop-mal.md
@@ -44,14 +44,17 @@ s'étaient montrés critiques, très négatifs et s'étaient beaucoup
 plaints. C'est la mère d'Eugène qui prononçait souvent cette phrase :
 « Il y en a toujours pour trouver que le pain a trop de farine ! ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_174.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_174.mp4" type="video/mp4">
 </video>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_174debut.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_174debut.mp4" type="video/mp4">
 </video>
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_174fin.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_174fin.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-175-voleur-de-houx-seconde-partie.md b/content/les-planches/planche-175-voleur-de-houx-seconde-partie.md
index 373ef6e..35124a1 100644
--- a/content/les-planches/planche-175-voleur-de-houx-seconde-partie.md
+++ b/content/les-planches/planche-175-voleur-de-houx-seconde-partie.md
@@ -45,6 +45,7 @@ houx.
 Les deux trous indiquent certainement que cette planche fut suspendue
 vers le lieu du « conflit » pour être lu par le voisin concerné.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_175.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_175.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-176-le-prix-de-la-terre.md b/content/les-planches/planche-176-le-prix-de-la-terre.md
index ebc845e..fb5695d 100644
--- a/content/les-planches/planche-176-le-prix-de-la-terre.md
+++ b/content/les-planches/planche-176-le-prix-de-la-terre.md
@@ -50,6 +50,7 @@ dernier mot.
 Le maïs se disait autrefois en patois « trôqui », car l'idée s'était
 répandue qu'il provenait de Turquie (!?).
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_176-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_176-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-177-un-futur-champion.md b/content/les-planches/planche-177-un-futur-champion.md
index 2f3f3a4..b264af3 100644
--- a/content/les-planches/planche-177-un-futur-champion.md
+++ b/content/les-planches/planche-177-un-futur-champion.md
@@ -35,6 +35,7 @@ cyclistes.
 
 Eugène joue sur le double sens du mot « percer ».
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_177.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_177.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-178-ce-qui-reste-apres-nous.md b/content/les-planches/planche-178-ce-qui-reste-apres-nous.md
index edadb10..58cf8c5 100644
--- a/content/les-planches/planche-178-ce-qui-reste-apres-nous.md
+++ b/content/les-planches/planche-178-ce-qui-reste-apres-nous.md
@@ -38,6 +38,7 @@ Le Gène
 
 Sans commentaire.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_178.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_178.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-179-attention-aux-bosses.md b/content/les-planches/planche-179-attention-aux-bosses.md
index fa57a6a..bf0567c 100644
--- a/content/les-planches/planche-179-attention-aux-bosses.md
+++ b/content/les-planches/planche-179-attention-aux-bosses.md
@@ -40,6 +40,7 @@ Le mot « Pôkâ » correspond aux coups donnés par les vaches avec leurs
 cornes.
 
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_179.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_179.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-180-au-fond-du-puits.md b/content/les-planches/planche-180-au-fond-du-puits.md
index 59ea009..7dc3778 100644
--- a/content/les-planches/planche-180-au-fond-du-puits.md
+++ b/content/les-planches/planche-180-au-fond-du-puits.md
@@ -37,6 +37,7 @@ Le Gène
 Expression autrefois courante pour évoquer avec humour les personnes
 qui manifestent un goût un peu trop immodéré pour le vin !
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_180-2.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_180-2.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-181-l-oreille-fendue.md b/content/les-planches/planche-181-l-oreille-fendue.md
index 9be22cd..6aeba78 100644
--- a/content/les-planches/planche-181-l-oreille-fendue.md
+++ b/content/les-planches/planche-181-l-oreille-fendue.md
@@ -48,6 +48,7 @@ Les trois parties du texte écrites en lettres de plus en plus petites
 indiquent qu'il faille les lires en baissant progressivement le son,
 comme pour tester le malentendant.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_181.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_181.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-183-du-vert-pour-mes-vaches.md b/content/les-planches/planche-183-du-vert-pour-mes-vaches.md
index de0887a..0c5c4f4 100644
--- a/content/les-planches/planche-183-du-vert-pour-mes-vaches.md
+++ b/content/les-planches/planche-183-du-vert-pour-mes-vaches.md
@@ -38,6 +38,7 @@ proposer de leur donner un journal à lire pour les occuper…
 Eugène a amélioré la proposition en rajoutant la couleur verte pour
 pouvoir mieux les abuser.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_183.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_183.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-184-un-bon-gueuleton.md b/content/les-planches/planche-184-un-bon-gueuleton.md
index 164e206..6fff84d 100644
--- a/content/les-planches/planche-184-un-bon-gueuleton.md
+++ b/content/les-planches/planche-184-un-bon-gueuleton.md
@@ -32,6 +32,7 @@ Le Gène
 
 Sans commentaire !
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_184.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_184.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-185-le-telethon.md b/content/les-planches/planche-185-le-telethon.md
index 0abbe4b..f099a0e 100644
--- a/content/les-planches/planche-185-le-telethon.md
+++ b/content/les-planches/planche-185-le-telethon.md
@@ -32,6 +32,7 @@ travaux d'Eugène à l'occasion du Téléthon. L'entrée était gratuite,
 mais les visiteurs étaient ainsi incités à la manière d'Eugène à
 verser une participation.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_185.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_185.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-186-les-roses-et-la-republique.md b/content/les-planches/planche-186-les-roses-et-la-republique.md
index 1301d4b..03ba496 100644
--- a/content/les-planches/planche-186-les-roses-et-la-republique.md
+++ b/content/les-planches/planche-186-les-roses-et-la-republique.md
@@ -48,6 +48,7 @@ oubliée derrière d'autres matériaux dans le garage d'Eugène.
 avoir eu une vie ou une période de vie, facile, sans désagrément ni
 travail trop pénible.
 
-<video width="320" height="240" controls>
+<video width="320" height="240" controls
+  poster="{static}/images/thumbnails/video_186.jpg">
   <source src="https://d1njpgd0ygatdn.cloudfront.net/video_186.mp4" type="video/mp4">
 </video>
diff --git a/content/les-planches/planche-187-galoche-a-ton-pied.html b/content/les-planches/planche-187-galoche-a-ton-pied.html
index 0f84d0f..7406d5e 100644
--- a/content/les-planches/planche-187-galoche-a-ton-pied.html
+++ b/content/les-planches/planche-187-galoche-a-ton-pied.html
@@ -65,7 +65,8 @@ <h2>Commentaire</h2>
            style="width: 80%; padding: 10px; margin: 10px auto; display: block;">
     </div>
 
-    <video width="320" height="240" controls>
+    <video width="320" height="240" controls
+           poster="{static}/images/thumbnails/video_187.jpg">
       <source src="https://d1njpgd0ygatdn.cloudfront.net/video_187.mp4" type="video/mp4">
     </video>