Add workaround for GM sandbox and refactor userscript a bit

player/gdrive-player.coffee

@@ -4,3 +4,19 @@ window.GoogleDrivePlayer = class GoogleDrivePlayer extends VideoJSPlayer
             return new GoogleDrivePlayer(data)
 
         super(data)
+
+    load: (data) ->
+        if typeof window.getGoogleDriveMetadata is 'function'
+            window.getGoogleDriveMetadata(data.id, (error, metadata) =>
+                if error
+                    console.error(error)
+                    alertBox = window.document.createElement('div')
+                    alertBox.className = 'alert alert-danger'
+                    alertBox.textContent = error.message
+                    document.getElementById('ytapiplayer').appendChild(alertBox)
+                else
+                    data.meta.direct = metadata.videoMap
+                    super(data)
+            )
+        else
+            super(data)

player/update.coffee

@@ -33,7 +33,7 @@ window.loadMediaPlayer = (data) ->
     else if data.type is 'gd'
         try
             if data.meta.html5hack or window.hasDriveUserscript
-                window.PLAYER = new window.GoogleDrivePlayer(data)
+                window.PLAYER = new GoogleDrivePlayer(data)
             else
                 window.PLAYER = new GoogleDriveYouTubePlayer(data)
         catch e

player/videojs.coffee

@@ -43,8 +43,7 @@ window.VideoJSPlayer = class VideoJSPlayer extends Player
         if not (this instanceof VideoJSPlayer)
             return new VideoJSPlayer(data)
 
-        @setMediaProperties(data)
-        @loadPlayer(data)
+        @load(data)
 
     loadPlayer: (data) ->
         waitUntilDefined(window, 'videojs', =>