Arduino video playback

I'm very new to this, but a quick question. For an art project, I'd like to be able to playback a short video (mp4 or something) on an LCD screen when a motion sensor is tripped.

  1. I'm assuming the motion sensor part is pretty easy: http://antipastohw.blogspot.com/2007/12/arduino-with-radion-shack-parallax.html
  2. I haven't seen much (nada) about video playback and what is needed. Would the TouchShield be capable of displaying video? I suppose I could store the video on a min-SD. I saw an audio shield (WaveShield) that Lady Ada made: Audio Shield for Arduino.

Any shields or projects out there for video playback? The quality wouldn't have to be good, as a matter of fact the video I display would probably be pretty heavily processed/pixilated.

Any help would be appreciated.

I don't think that there are any easy / simple solution to your problem.

The Arduino board only has 1 K RAM which is limiting it's ability to store / buffer any substantial amount of data.
Reading video from an SD card would probably too slow.

If display size is not a major problem the you could try to find a cheap mp3/mp4 player and interface Arduino to control it's play button.
That would be much simpler.