Please tell me how you did it?
Simple. When I enter YouTube and select a movie, the script included in OWB adds view (and download) options below the inactive Flash object. Then I select viewing, Flash object gets replaced with internal player. Then it just play the movie. If a movie is available as HTML 5, I can play it directly (I've entered the YouTube HTML 5 betatest page, so I'm always offerred a HTML 5 version if available).