In that case that setup is pretty badass. My 2016 LTZ came with a dual Headrest rear entertainment system as a dealer installed option. I haven't spent much time trying to figure the system out since my daughter would rather connect to the trucks wi-fi and stream movies and tv shows on her phone.
My wife tried playing a movie once but gave up when she realized the movie wouldn't play on the front screen while driving and that there was no sound without using headphones. My old truck had an aftermarket Kenwood system with video in motion and audio through the trucks speaker system.
I would need the video in motion to play the movie on my front screen.
As far as sound, your set up should have the fm transmitter as well. I think audiovox, advent are made by voxx. Which manufactures most rear headrest screens for automakers. I saved a few hundred by going aftermarket. But found out from my buddy who ordered/installed ours that it's pretty much all the same. Dealer just marks it up.
Just play around with it when you get a chance. They do so many things. Even has screen savers! The manual helped out quite a bit.
