This userscript is excellent. It plays videos flawlessly in VLC where others like Youtube Without Flash Auto do not.
The only complaints are that it does not have a buffer indicator (showing you how much of the video is playable) and it does not let you seek to a specific part of the video.
Works just as promised.Good work.
Finaly a script that will remove the ressource hungry youtube player. This guy is a got. Now praise him!