Can I use any song with a CC license on it?
Almost — you need to make sure that what you want to do with the music is OK under the terms of the particular Creative Commons license it’s under. CC-licensed music isn’t free for all uses, only some — so make sure to check out the terms (you can find these by clicking on each song’s license icon).
Most importantly, you need to use music that is not licensed under a No Derivative Works license. This means that the musician doesn’t want you to change, transform, or make a derivative work using their music. Under CC licenses, synching the music to images amounts to transforming the music, so you can’t legally use a song under a CC No Derivative Works license in your video.
Also, make sure to properly credit the musician and the track, as well as express the CC license the track is under. For example, you might include text like this at the end of your video:
Wednesday, November 18, 2009
Creative Commons - Legal Music for Videos
The Creative Commons website has a page about using music legally in video projects.