Script Summary: OpenYoutube allows you to read Youtube videos using a Firefox plugin (vlc or totem provide such plugins). You do not need Flash at all.
This script works with both regular pages and user pages (http://www.youtube.com/user/username).
It only works with Firefox, but I'd be happy to apply patches and make sure it works with other free/open-source browsers. Note that I do *not* care about other browsers.