video editing freeware?

hey flist, I need some software for cutting/pasting video. I want to upload a vid to youtube but it is over 10minutes and I want to cut it into 2 pieces. Any suggestions or trustworthy sites you guys know about?

ETA: hey, apparently I have something called Windows movie maker which should work...
EATA: Oh wait, these are MP4's and apparently aren't supported in moviemaker. Bah.