diff --git a/assets/js/tuto1.js b/assets/js/tuto1.js
index f9e0472e52ed3b978b58cd636fb6bea2af08e084..57acf0d4c497e71f167a2386a9ab877fc72c9ffd 100644
--- a/assets/js/tuto1.js
+++ b/assets/js/tuto1.js
@@ -32,6 +32,7 @@
     let lang = $application.attr('data-lang');
     // Lang file extension used for subtitles
     let langExt = lang && lang === 'fr' ? '':`-${lang}`;
+    let videoExt = lang && lang === 'fr' ? '':`-en`;
 
     // Chemins
     let dataFolder = baseURL + "/data";
@@ -102,7 +103,7 @@
                 closeWebcam();
 
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto1/mp4/tuto1-activite1-vid1.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto1/mp4/tuto1-activite1-vid1" + videoExt + ".mp4";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto1-activite1-vid1" + langExt + ".vtt";
                 break;
 
@@ -115,7 +116,7 @@
                 closeWebcam();
 
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto1/mp4/tuto1-activite1-vid2.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto1/mp4/tuto1-activite1-vid2" + videoExt + ".mp4";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto1-activite1-vid2" + langExt + ".vtt";
                 break;
 
@@ -144,25 +145,25 @@
 
             case '/experimenter/etape6':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto1/mp4/tuto1-activite1-vid3.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto1/mp4/tuto1-activite1-vid3" + videoExt + ".mp4";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto1-activite1-vid3" + langExt + ".vtt";
                 break;
 
             case '/experimenter/etape8':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto1/mp4/tuto1-activite1-vid4.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto1/mp4/tuto1-activite1-vid4" + videoExt + ".mp4";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto1-activite1-vid4" + langExt + ".vtt";
                 break;
 
             case '/experimenter/etape10':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto1/mp4/tuto1-activite1-vid5.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto1/mp4/tuto1-activite1-vid5" + videoExt + ".mp4";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto1-activite1-vid5" + langExt + ".vtt";
                 break;
 
             case '/creer/etape1':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto1/mp4/tuto1-activite1-vid6.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto1/mp4/tuto1-activite1-vid6" + videoExt + ".mp4";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto1-activite1-vid6" + langExt + ".vtt";
                 break;
 
@@ -186,7 +187,7 @@
                 closeWebcam();
 
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto1/mp4/tuto1-activite1-vid7.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto1/mp4/tuto1-activite1-vid7" + videoExt + ".mp4";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto1-activite1-vid7" + langExt + ".vtt";
                 break;
 
diff --git a/assets/js/tuto2.js b/assets/js/tuto2.js
index 6e943697ec82964017feb06cf06982c928ab0fab..8e22fd1164cdfbf0f18c48dcf2fad9aa6ea78787 100644
--- a/assets/js/tuto2.js
+++ b/assets/js/tuto2.js
@@ -32,6 +32,7 @@
     let lang = $application.attr('data-lang');
     // Lang file extension used for subtitles
     let langExt = lang && lang === 'fr' ? '':`-${lang}`;
+    let videoExt = lang && lang === 'fr' ? '':`-en`;
 
     // Chemins
     let dataFolder = baseURL + "/data";
@@ -102,7 +103,7 @@
                 closeWebcam();
 
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto2/mp4/tuto2-activite1-vid1.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto2/mp4/tuto2-activite1-vid1" + videoExt + ".mp4";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto2-activite1-vid1" + langExt + ".vtt";
                 break;
 
@@ -113,7 +114,7 @@
 
             case '/tester/etape3':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto2/mp4/tuto2-activite1-vid2.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto2/mp4/tuto2-activite1-vid2" + videoExt + ".mp4";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto2-activite1-vid2" + langExt + ".vtt";
                 break;
 
@@ -121,7 +122,7 @@
                 closeWebcam();
 
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto2/mp4/tuto2-activite1-vid3.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto2/mp4/tuto2-activite1-vid3" + videoExt + ".mp4";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto2-activite1-vid3" + langExt + ".vtt";
 
                 // Suppression des catégories et sélections d'images précédemment définies
@@ -153,7 +154,7 @@
 
             case '/experimenter/etape6':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto2/mp4/tuto2-activite1-vid4.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto2/mp4/tuto2-activite1-vid4" + videoExt + ".mp4";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto2-activite1-vid4" + langExt + ".vtt";
                 break;
 
@@ -166,13 +167,13 @@
 
             case '/experimenter/etape10':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto2/mp4/tuto2-activite1-vid5.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto2/mp4/tuto2-activite1-vid5" + videoExt + ".mp4";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto2-activite1-vid5" + langExt + ".vtt";
                 break;
 
             case '/creer/etape1':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto2/mp4/tuto2-activite1-vid6.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto2/mp4/tuto2-activite1-vid6" + videoExt + ".mp4";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto2-activite1-vid6" + langExt + ".vtt";
 
                 // Suppression des catégories et sélections d'images précédemment définies
@@ -201,7 +202,7 @@
                 closeWebcam();
 
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto2/mp4/tuto2-activite1-vid7.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto2/mp4/tuto2-activite1-vid7" + videoExt + ".mp4";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto2-activite1-vid7" + langExt + ".vtt";
                 break;
 
diff --git a/assets/js/tuto3-1.js b/assets/js/tuto3-1.js
index fb7198eff2344c8a96ab059c8b9375cced2517ea..8a5cb71f59f2c875cb8d0fabfbc15a794fe13fca 100644
--- a/assets/js/tuto3-1.js
+++ b/assets/js/tuto3-1.js
@@ -29,6 +29,7 @@
     let lang = $application.attr('data-lang');
     // Lang file extension used for subtitles
     let langExt = lang && lang === 'fr' ? '':`-${lang}`;
+    let videoExt = lang && lang === 'fr' ? '':`-en`;
 
     // Chemins
     let dataFolder = baseURL + "/data";
@@ -80,7 +81,7 @@
 
             case '/':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite1-vid1.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite1-vid1" + videoExt + ".mp4";
                 templateParams.posterPath = tutorialFolder + "/medias/poster-neutre.jpg";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto3-activite1-vid1" + langExt + ".vtt";
                 break;
@@ -200,14 +201,14 @@
 
             case '/comprendre/etape1':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite1-vid2.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite1-vid2" + videoExt + ".mp4";
                 templateParams.posterPath = tutorialFolder + "/medias/poster-neutre.jpg";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto3-activite1-vid2" + langExt + ".vtt";
 
                 break;
             case '/conclure/etape1':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite1-vid3.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite1-vid3" + videoExt + ".mp4";
                 templateParams.posterPath = tutorialFolder + "/medias/poster-neutre.jpg";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto3-activite1-vid3" + langExt + ".vtt";
 
diff --git a/assets/js/tuto3-2.js b/assets/js/tuto3-2.js
index d9305ffc01a5f12280276d4c45e1389b3c8ce401..a2cee0e63e543e4a28cb9d81dab622e500daebc3 100644
--- a/assets/js/tuto3-2.js
+++ b/assets/js/tuto3-2.js
@@ -29,6 +29,7 @@
     let lang = $application.attr('data-lang');
     // Lang file extension used for subtitles
     let langExt = lang && lang === 'fr' ? '':`-${lang}`;
+    let videoExt = lang && lang === 'fr' ? '':`-en`;
 
     // Chemins
     let dataFolder = baseURL + "/data";
@@ -72,20 +73,20 @@
 
             case '/':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite2-vid1.mp4 ";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite2-vid1" + videoExt + ".mp4 ";
                 templateParams.posterPath = tutorialFolder + "/medias/poster-minus.jpg";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto3-activite2-vid1" + langExt + ".vtt";
                 break;
             case '/comprendre/etape1':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite2-vid2.mp4 ";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite2-vid2" + videoExt + ".mp4 ";
                 templateParams.posterPath = tutorialFolder + "/medias/poster-neutre.jpg";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto3-activite2-vid2" + langExt + ".vtt";
 
                 break;
             case '/conclure/etape1':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite2-vid3.mp4 ";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite2-vid3" + videoExt + ".mp4 ";
                 templateParams.posterPath = tutorialFolder + "/medias/poster-neutre.jpg";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto3-activite2-vid3" + langExt + ".vtt";
 
diff --git a/assets/js/tuto3-3.js b/assets/js/tuto3-3.js
index cfd3072296206c5b5bfebb19ea40aad0006a7568..f705ce13faf6641e95412a2493544cb0169da1b0 100644
--- a/assets/js/tuto3-3.js
+++ b/assets/js/tuto3-3.js
@@ -29,6 +29,7 @@
     let lang = $application.attr('data-lang');
     // Lang file extension used for subtitles
     let langExt = lang && lang === 'fr' ? '':`-${lang}`;
+    let videoExt = lang && lang === 'fr' ? '':`-en`;
 
     // Chemins
     let dataFolder = baseURL + "/data";
@@ -81,20 +82,20 @@
 
             case '/':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite3-vid1.mp4 ";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite3-vid1" + videoExt + ".mp4 ";
                 templateParams.posterPath = tutorialFolder + "/medias/poster-neutre.jpg";//tutorialFolder + "/medias/vid1.jpg"; //!!!!!!!!!!!!!!!!!!!!!!!!!!! à remettre
 
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto3-activite3-vid1" + langExt + ".vtt";
                 break;
             case '/comprendre/etape1':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite3-vid2.mp4 ";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite3-vid2" + videoExt + ".mp4 ";
                 templateParams.posterPath = tutorialFolder + "/medias/poster-neutre.jpg";//tutorialFolder + "/medias/vid1.jpg"; //!!!!!!!!!!!!!!!!!!!!!!!!!!! à remettre
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto3-activite3-vid2" + langExt + ".vtt";
                 break;
             case '/conclure/etape1':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite3-vid3.mp4 ";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite3-vid3" + videoExt + ".mp4 ";
                 templateParams.posterPath = tutorialFolder + "/medias/poster-neutre.jpg";//tutorialFolder + "/medias/vid1.jpg"; //!!!!!!!!!!!!!!!!!!!!!!!!!!! à remettre
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto3-activite3-vid3" + langExt + ".vtt";
                 break;
diff --git a/assets/js/tuto3-4.js b/assets/js/tuto3-4.js
index ba27041e643039bbdfd62107e8f0a73a0d5d86c1..c76c2075788261e33b400c94413a1bdf78a69bfa 100644
--- a/assets/js/tuto3-4.js
+++ b/assets/js/tuto3-4.js
@@ -29,6 +29,7 @@
     let lang = $application.attr('data-lang');
     // Lang file extension used for subtitles
     let langExt = lang && lang === 'fr' ? '':`-${lang}`;
+    let videoExt = lang && lang === 'fr' ? '':`-en`;
 
     // Chemins
     let dataFolder = baseURL + "/data";
@@ -72,20 +73,20 @@
 
             case '/':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite4-vid1.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite4-vid1" + videoExt + ".mp4";
                 templateParams.posterPath = tutorialFolder + "/medias/poster-neutre.jpg";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto3-activite4-vid1" + langExt + ".vtt";
                 break;
             case '/comprendre/etape1':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite4-vid2.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite4-vid2" + videoExt + ".mp4";
                 templateParams.posterPath = tutorialFolder + "/medias/poster-neutre.jpg";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto3-activite4-vid2" + langExt + ".vtt";
 
                 break;
             case '/conclure/etape1':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite4-vid3.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-activite4-vid3" + videoExt + ".mp4";
                 templateParams.posterPath = tutorialFolder + "/medias/poster-neutre.jpg";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto3-activite4-vid3" + langExt + ".vtt";
 
diff --git a/assets/js/tuto3.js b/assets/js/tuto3.js
index e1cf03b3734f07d5a371d96df03f3a17219940ec..361f04c4009d100885b4c6027d9d219250cabd90 100644
--- a/assets/js/tuto3.js
+++ b/assets/js/tuto3.js
@@ -29,6 +29,7 @@
     let lang = $application.attr('data-lang');
     // Lang file extension used for subtitles
     let langExt = lang && lang === 'fr' ? '':`-${lang}`;
+    let videoExt = lang && lang === 'fr' ? '':`-en`;
 
     // Chemins
     let dataFolder = baseURL + "/data";
@@ -84,14 +85,14 @@
 
             case '/':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-0-preambule.mp4";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-0-preambule" + videoExt + ".mp4";
                 templateParams.posterPath = tutorialFolder + "/medias/poster-journal.jpg";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto3-0-preambule" + langExt + ".vtt";
                 break;
 
             case '/conclusion':
                 // Chemin de la vidéo à insérer dans la template :
-                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-conclusion.mp4 ";
+                templateParams.videoPath = "https://files.inria.fr/mecsci/classcodeIAI/tuto3/mp4/tuto3-conclusion" + videoExt + ".mp4 ";
                 templateParams.posterPath = tutorialFolder + "/medias/poster-neutre.jpg";
                 templateParams.subtitlePath = tutorialFolder + "/vtt/tuto3-conclusion" + langExt + ".vtt";
 
diff --git a/data/tuto3-1/vtt/tuto3-activite1-vid1-en.vtt b/data/tuto3-1/vtt/tuto3-activite1-vid1-en.vtt
index 1cd1ea4a81276fae3c5dd64be562757db66d1c98..6306ff6081aa9dd2574e6659668194e65d1147f4 100644
--- a/data/tuto3-1/vtt/tuto3-activite1-vid1-en.vtt
+++ b/data/tuto3-1/vtt/tuto3-activite1-vid1-en.vtt
@@ -1,55 +1,74 @@
 WEBVTT
 
+1
 00:00:04.528 --> 00:00:07.349
 To create images, artificial intelligence
 
+2
 00:00:07.349 --> 00:00:09.771
 relies on very special Neural Networks…
 
+3
 00:00:09.771 --> 00:00:12.261
 Generative Adversarial Networks,
 
+4
 00:00:12.261 --> 00:00:14.031
 better known as GAN.
 
+5
 00:00:14.031 --> 00:00:16.670
 The GAN is a kind of abracadabra brawler
 
+6
 00:00:16.670 --> 00:00:18.055
 for creating images.
 
+7
 00:00:18.055 --> 00:00:20.729
 GAN consists of two neural networks
 
+8
 00:00:20.729 --> 00:00:22.135
 competing against each other
 
+9
 00:00:22.135 --> 00:00:24.621
 the generator, the discriminator.
 
+10
 00:00:24.621 --> 00:00:26.604
 The two neural networks
 
+11
 00:00:26.604 --> 00:00:28.074
 compete against each other
 
+12
 00:00:28.074 --> 00:00:30.111
 and one tries to fool the other.
 
+13
 00:00:30.111 --> 00:00:33.000
 The task for the generator is to generate
 
+14
 00:00:33.000 --> 00:00:35.525
 thousands and thousands of new images.
 
+15
 00:00:35.525 --> 00:00:37.830
 For the discriminator, it is to know
 
+16
 00:00:37.830 --> 00:00:40.194
 whether the image is generated or not.
 
+17
 00:00:40.194 --> 00:00:42.920
 And you, are you a good neural network?
 
+18
 00:00:42.920 --> 00:00:45.703
 Will you be able to flush out the AI?
+
diff --git a/data/tuto3-1/vtt/tuto3-activite1-vid2-en.vtt b/data/tuto3-1/vtt/tuto3-activite1-vid2-en.vtt
index 65516b8fe23befb73b258c9eb99b43221ca27b2f..63c25c30ab2bb24265d1468d6b099df43e673681 100644
--- a/data/tuto3-1/vtt/tuto3-activite1-vid2-en.vtt
+++ b/data/tuto3-1/vtt/tuto3-activite1-vid2-en.vtt
@@ -1,64 +1,86 @@
 WEBVTT
 
+1
 00:00:04.397 --> 00:00:06.150
 So, are you a good
 
+2
 00:00:06.150 --> 00:00:08.096
 discriminating neural network?
 
+3
 00:00:08.096 --> 00:00:10.670
 Each time the generated image is considered
 
+4
 00:00:10.670 --> 00:00:12.559
 as real by the discriminator network,
 
+5
 00:00:12.559 --> 00:00:14.619
 the generative network reinforces
 
+6
 00:00:14.619 --> 00:00:17.293
 its parameters and progressively improves.
 
+7
 00:00:17.293 --> 00:00:19.230
 Some elements of the image
 
+8
 00:00:19.230 --> 00:00:21.920
 can particularly betray a generative AI:
 
+9
 00:00:21.920 --> 00:00:23.807
 the background of the image,
 
+10
 00:00:23.807 --> 00:00:24.865
 the teeth,
 
+11
 00:00:24.865 --> 00:00:27.645
 the asymmetry of the face or eyes,
 
+12
 00:00:27.645 --> 00:00:30.000
 unexpected blurred areas,
 
+13
 00:00:30.000 --> 00:00:31.840
 a hair a bit strange.
 
+14
 00:00:31.840 --> 00:00:33.524
 If you look carefully,
 
+15
 00:00:33.524 --> 00:00:35.565
 the images generated by GANs
 
+16
 00:00:35.565 --> 00:00:37.392
 are still recognizable,
 
+17
 00:00:37.392 --> 00:00:40.000
 but these bugs may well be corrected
 
+18
 00:00:40.000 --> 00:00:41.671
 in the years to come and it will be
 
+19
 00:00:41.671 --> 00:00:44.000
 increasingly difficult to distinguish them!
 
+20
 00:00:44.000 --> 00:00:45.627
 Want to try again?
 
+21
 00:00:45.627 --> 00:00:48.142
 It's up to you!
+
diff --git a/data/tuto3-1/vtt/tuto3-activite1-vid3-en.vtt b/data/tuto3-1/vtt/tuto3-activite1-vid3-en.vtt
index 2dd26cf1f398fedd1e4f232b69481c8be68d211a..fffa4e3790df2b4bc3aa937e01beb501ab13653a 100644
--- a/data/tuto3-1/vtt/tuto3-activite1-vid3-en.vtt
+++ b/data/tuto3-1/vtt/tuto3-activite1-vid3-en.vtt
@@ -1,55 +1,74 @@
 WEBVTT
 
+1
 00:00:04.159 --> 00:00:06.160
 This type of new neural network
 
+2
 00:00:06.160 --> 00:00:07.603
 raises many questions
 
+3
 00:00:07.603 --> 00:00:09.850
 as these GANs exist for all media:
 
+4
 00:00:09.850 --> 00:00:13.509
 text, music, animated images or videos.
 
+5
 00:00:13.509 --> 00:00:16.084
 So, real or fake?
 
+6
 00:00:16.084 --> 00:00:17.930
 It is becoming essential to learn
 
+7
 00:00:17.930 --> 00:00:19.990
 to recognize whether an image is real
 
+8
 00:00:19.990 --> 00:00:21.281
 or machine generated.
 
+9
 00:00:21.281 --> 00:00:22.969
 But how long before the details
 
+10
 00:00:22.969 --> 00:00:24.485
 are no longer visible?
 
+11
 00:00:24.485 --> 00:00:26.670
 Are all types of content affected
 
+12
 00:00:26.670 --> 00:00:28.629
 by these generative possibilities?
 
+13
 00:00:28.629 --> 00:00:30.648
 Who is the author of these images?
 
+14
 00:00:30.648 --> 00:00:32.770
 The person who created the programme?
 
+15
 00:00:32.770 --> 00:00:34.460
 The programme that created images
 
+16
 00:00:34.460 --> 00:00:35.703
 that did not exist?
 
+17
 00:00:35.703 --> 00:00:37.582
 And if we don't know if it's real,
 
+18
 00:00:37.582 --> 00:00:40.309
 is there an annihilation of fiction?
+