Probably not good info for fussy types, but no problem for years with an ordinary DVD player (also plays CDs , even of the kind the 2003 truck's player won't play) This DVD has that feature to upgrade the video on older DVDs. That actually works! Did a comparison with an older player that didn't have that.
Instead of using the not so good speakers in the TV, I use a set of 2.1 powered speakers meant for a computer. You need the Y adapter with red and white plugs into the back of the DVD player that goes to a stereo mini-plug and then a connecting piece that joins that to the green mini-plug on the speaker wiring. The TV , DVD, and speakers all plug into a power bar that goes to a receptacle powered by an inverter, so you can do it all off-grid.
I know it is all old -tech, but it's good enough for me! I like those old movies and TV show DVDs you can borrow from the library, and our set-up is great for those.