Yup got it working on my Caddy so my kid can watch movies when we go on long trips.
Have to hit the 2nd button down on the right side and Seek button at the same time when playing a movie and then it works while driving.
There was someone who found out how to make the C6 NAV input a new destination when driving by breaking the speed sensor
input on the radio unit. Dont know if that works for watching movies also or if they monitor the parking brake or other inputs?