FreeGameDev

Found this pretty cool video: http://youtu.be/qRI0BQgoycY

Also check out the other creative commons licensed songs on that channel if you are into electronic music.

Does anyone else have examples of cool "mainstream" compatible Free Software/Culture promotion videos etc.?

This is their (quite good in my opinion) channel: https://soundcloud.com/mmmontagemusic
So far everything I checked was CC-by, although some downloads required a facebook account