YouTube has started to host Creative Commons licensed videos.
This means that anyone can reuse and re-edit these videos without fear of violating copyrights, as long as they give credit to its original creators.
Initially, there will be over 10,000 Creative Commons videos. YouTube is working with organizations like C-SPAN, PubllicResource.org, Voice of America, Al Jazeera and others.
To get started, visit youtube.com/editor and selecc the CC tab.