Add vp9 test video

Rename mp4 video to h.264 because mp4 is only a
container

Content/wallpaper_video_astronaut_vp9/project.json

@@ -0,0 +1,14 @@
+{
+    "description": "",
+    "file": "mantissa.xyz_loop_075.webm",
+    "preview": "preview.jpg",
+    "previewGIF": "preview.gif",
+    "previewThumbnail": "previewThumbnail.jpg",
+    "previewWEBM": "preview.webm",
+    "tags": [
+    ],
+    "title": "mantissa.xyz_loop_075",
+    "type": "videoWallpaper",
+    "videoCodec": "VP8",
+    "youtube": ""
+}

ScreenPlayWallpaper/main.cpp

@@ -46,7 +46,8 @@ int main(int argc, char* argv[])
     if (argumentList.length() == 1) {
         QString exampleContentPath = QString(SCREENPLAY_SOURCE_DIR) + "/Content";
         QStringList contentFolder = {
-            "/wallpaper_video_nebula",
+            "/wallpaper_video_astronaut_vp9",
+            "/wallpaper_video_nebula_h264",
             "/wallpaper_interactive",
             "/wallpaper_landscape",
             "/wallpaper_particles"