Yes, my wife's Acadia had a DVD player, but to be honest physical media (ie DVDs and CDs and maybe Blu-Rays) are going the way of the dodo bird.
We have a bunch of movies for the kids I put on a tiny USB stick and are expecting our Gator this week or next. You can "rip" DVD to movies with a variety of different software programs.
In the second video it shows you can hook up a Roku streaming stick to the HDMI port which you can then hook up to the cars WiFi and stream Netflix/Youtube, etc over the cars data plan.