CC Search - Search for Creative Commons-licensed media including images, music and movies
Internet Archice 35mm Stock Footage Internet Archive provides 35mm video footage under a CC Attribution License
Community Video - Open source (free) movies from Internet Archive.
The VJ Loops sub collection at the Internet Archive provides stock video clips that can be used for projects.
Public Domain Flicks provides, you guessed it, public domain flicks!
Vimeo: Creative Commons Search Find Creative Commons-licensed videos on this popular video site.
WGBH Lab provides video projects under CC licenses that you can use for presentations, etc.
