Video player add ogv and webm support

Author: VisualSJ

extensions/ccui/uiwidgets/UIVideoPlayer.js

@@ -257,11 +257,20 @@ ccui.VideoPlayer.EventType = {
     };
 
     (function(){
+        /**
+         * Some old browser only supports Theora encode video
+         * But native does not support this encode,
+         * so it is best to provide mp4 and webm or ogv file
+         */
         var dom = document.createElement("video");
-        if(dom.canPlayType("video/ogg"))
+        if(dom.canPlayType("video/ogg")){
             video._polyfill.canPlayType.push(".ogg");
+            video._polyfill.canPlayType.push(".ogv");
+        }
         if(dom.canPlayType("video/mp4"))
             video._polyfill.canPlayType.push(".mp4");
+        if(dom.canPlayType("video/webm"))
+            video._polyfill.canPlayType.push(".webm");
     })();
 
     if(cc.sys.OS_IOS === cc.sys.os){