It did indeed. The box I purchased had a video in motion capability. Bascially there were 3 wires (from memory, Red, Black and Yellow). Red and black were just power and earth, (the power I took from the CD changer connector, so that when the MFD2 was off, so was the box). The yellow wire got run to a small microswitch that I fitting inside my ashtray out of site. When the yellow wire saw 12V power (taken from the cigarette lighter harness), then I got full video in motion.
TBH, I never used this watching movies on the go (too dangerous) but had it so that I could see the screen with the MP3 files on it, and get track names etc. displaying on screen on the MFD2. When the ashtray swich was in the off position, I just got the "Your screen has been disabled for safety reasons" (or something like that). I had it like this for nearly 2 years and it worked really well. It was only because the aux in box wasn't compatible with my new RNS-510, that I ended up giving it to Darren (Mortygttdi), as a thanks for all the little favours he had done me in the past.
Only other thing worth mentioning, it that obviously, you can't control your external source from the MFD2 head unit itself. My Dvico has a small remote that lived in the drinks holder in the centre console, that I just aimed at the dash to change tracks etc. I had fitted a very small IR receiver wired back to the Dvico, fitted just under the centre of the dash (below the climate controls) that picked up the remote from almost any angle.