DIY Touch Screen Movie

So I'm in need of some help. I'm trying to make a diy touch device that plays the movies right to my sons TV. He's special needs so navigating a regular streaming device UI isn't available. I'm looking for some combination of like a diy raspberry pi touch screen with a usb dongle connected to the TV. Even a hardwired touch screen option I can mount on the wall would work. But I want it to just have the pictures of his favorite movies, there's only 4, so when he wants to watch them he can. Any help is greatly appreciated!