VID-1568 - update image and video_info in a single transaction

@garthwebb @jsutterfield  @saipetch 


Can we just remove this method if we're no longer using it as a hook? Maybe we could delete this and the line in setup which registers it: https://github.com/Wikia/app/blob/dev/extensions/wikia/VideoHandlers/VideoHandlers.setup.php#L114 ? Unless you or @garthwebb knows a reason to keep it around?