Available from the Ableton Pack store, Adam Rokhsar's Max for Live device Rokvid is a synthesizer/effects processor for working with video. Whether using pre-recorded movies, or live from your camera, Rokvid's parameters go from subtle to psychedelic, and can be controlled manually, by LFOs, or by properties of input sound.
Adam Rokhsar has teamed up with Winksound to produce a couple tutorials that will get you on your way using Rokvid. First, Adam gives an overview of the device: