diff --git a/front/src/Phaser/Map/LayersFlattener.ts b/front/src/Phaser/Map/LayersFlattener.ts
index d28402b5..fabce94b 100644
--- a/front/src/Phaser/Map/LayersFlattener.ts
+++ b/front/src/Phaser/Map/LayersFlattener.ts
@@ -10,7 +10,7 @@ export function flattenGroupLayersMap(map: ITiledMap) {
 }
 
 function flattenGroupLayers(layers: ITiledMapLayer[], prefix: string, flatLayers: ITiledMapLayer[]) {
-    for (const layer of layers) {
+    for (const layer of layers.map((layer) => ({ ...layer }))) {
         if (layer.type === "group") {
             flattenGroupLayers(layer.layers, prefix + layer.name + "/", flatLayers);
         } else {
diff --git a/maps/tests/index.html b/maps/tests/index.html
index 332875b9..6ea6cf80 100644
--- a/maps/tests/index.html
+++ b/maps/tests/index.html
@@ -90,6 +90,14 @@
                     <a href="#" class="testLink" data-testmap="mobile.json" target="_blank">Testing movement on mobile</a>
                 </td>
             </tr>
+            <tr>
+                <td>
+                    <input type="radio" name="test-mobile-video"> Success <input type="radio" name="test-mobile-video"> Failure <input type="radio" name="test-mobile-video" checked> Pending
+                </td>
+                <td>
+                    <a href="#" class="testLink" data-testmap="mobile_video.json" target="_blank">Testing video on mobile</a>
+                </td>
+            </tr>
             <tr>
                 <td>
                     <input type="radio" name="test-energy"> Success <input type="radio" name="test-energy"> Failure <input type="radio" name="test-energy" checked> Pending
diff --git a/maps/tests/mobile_video.json b/maps/tests/mobile_video.json
new file mode 100644
index 00000000..e7eb4e09
--- /dev/null
+++ b/maps/tests/mobile_video.json
@@ -0,0 +1,82 @@
+{ "compressionlevel":-1,
+ "height":10,
+ "infinite":false,
+ "layers":[
+        {
+         "data":[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1],
+         "height":10,
+         "id":1,
+         "name":"floor",
+         "opacity":1,
+         "type":"tilelayer",
+         "visible":true,
+         "width":10,
+         "x":0,
+         "y":0
+        }, 
+        {
+         "data":[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0],
+         "height":10,
+         "id":2,
+         "name":"start",
+         "opacity":1,
+         "type":"tilelayer",
+         "visible":true,
+         "width":10,
+         "x":0,
+         "y":0
+        }, 
+        {
+         "draworder":"topdown",
+         "id":3,
+         "name":"floorLayer",
+         "objects":[
+                {
+                 "height":281.232647439376,
+                 "id":3,
+                 "name":"",
+                 "rotation":0,
+                 "text":
+                    {
+                     "fontfamily":"Sans Serif",
+                     "pixelsize":11,
+                     "text":"Test:\nOpen the page on a mobile device AND on a desktop\nCreate a bubble\n\nResult:\nVideo is displayed correcly on both mobile and desktop. It is correctly centered too.\n\nTest:\nTurn the phone in landscape or portrait mode\n\nResult:\nOn the computer, the displayed video adapts automatically",
+                     "wrap":true
+                    },
+                 "type":"",
+                 "visible":true,
+                 "width":252.4375,
+                 "x":46.5894222943362,
+                 "y":34.2876372135732
+                }],
+         "opacity":1,
+         "type":"objectgroup",
+         "visible":true,
+         "x":0,
+         "y":0
+        }],
+ "nextlayerid":8,
+ "nextobjectid":5,
+ "orientation":"orthogonal",
+ "renderorder":"right-down",
+ "tiledversion":"2021.03.23",
+ "tileheight":32,
+ "tilesets":[
+        {
+         "columns":11,
+         "firstgid":1,
+         "image":"tileset1.png",
+         "imageheight":352,
+         "imagewidth":352,
+         "margin":0,
+         "name":"tileset1",
+         "spacing":0,
+         "tilecount":121,
+         "tileheight":32,
+         "tilewidth":32
+        }],
+ "tilewidth":32,
+ "type":"map",
+ "version":1.5,
+ "width":10
+}
\ No newline at end of file