Avoids double loading of the player.

modules/UI/shared_video/SharedVideo.js

         if (this.isSharedVideoShown)
             return;
 
+        this.isSharedVideoShown = true;
+
         // the video url
         this.url = url;
 
                 SHARED_VIDEO_CONTAINER_TYPE, self.sharedVideo);
             VideoLayout.handleVideoThumbClicked(self.url);
 
-            self.isSharedVideoShown = true;
-
             // If we are sending the command and we are starting the player
             // we need to continuously send the player current time position
             if(APP.conference.isLocalId(self.from)) {
         };
 
         window.onPlayerError = function(event) {
-            console.error("Error in the player:" + event.data);
+            console.error("Error in the player:", event.data);
         };
     }