Our stereo has DVD button too but too much BS to use.
We had the local Car toys install our duel headrest DVD.
The leather had to be sprayed the manufacture color and it matches perfect.
The kids enjoy them and they do not block the rear view mirror for the driver.
It only took 2.5 hours. I think it's Audiovox. Go units.
We also had back up sensors detectors installed. Mom likes the feature.