it's sony vegas
most likely, your clips are encoded in xvid or divx.
get virtualdubmod, import the video, compress it as lagarith, and edit with the lagarith file.
save as xvid when you finish editing though
KioAtWork: I'm so bored. I don't have class again for another half hour.
Minion: masturbate into someones desk and giggle about it for the remaining 28 minutes