Good news for wikivideo!
http://gizmodo.com/5807650/youtubes-creative-commons-license-lets-you-remix-...
YouTube, beginning today, is supposed to start offering a CC-BY licensing option for uploaders. "Al Jazeera and C-SPAN are launch partners and have agreed to release 10,000 Creative Commons videos." This will make it quite a bit easier to find free video, and easier for other organizations and individuals to free their videos.
Cool beans!
-Sage