I'm doing a sort-of puppet video for a school project, and I desperately need to be able to turn a video clip upside down. The way I have my setup, everything films perfectly, albeit upside-down. I can't adjust my setup (long story), so I need a free piece of software that can turn video upside down. It can either be some extension to iMovie, or stand alone. Thanks so much in advance... you're saving my English grade.