I have the Kenwood KIV-700 installed in my 1998 Audi A4 Quattro. The car has a manual transmission. Whenever I try to play any videos, I just hear audio, no video. I read up a little bit, and I guess people have been saying that your car has to be parked in order for the video to work. I thought this definitely had to be the case, because I never set my handbrake and I always just leave my car in gear and then turn it off. I got in my car, put it in neutral, pulled up the handbrake, and still the same problem.
Everything is hooked up correctly, but I only hear audio.