You aren't disliking the internet because you get older. You dislike it because it is taken over by enshittifying corporations.
At least it's like that for me.
Our car isn't made for elaborate stuff like that. Medium sized skoda estate that's a couple of years away from retirement (Cars in general are smaller here in Norway). So my setup is just a pre made kit snapped on to the base of the headrests and the wiring is hanging freely.
I have to think carefully about how to do something like this and keep it practical and relatively safe from the kids at the same time. 😅
I like the setup. We only have two separate DVD players that is mounted on the headrests, but you can link one of them to slave the other. They only support divx files via fat32 formatted usb thumb drives, but also have rgb input, so I have been dreaming of making a better solution. I have a raspberry pi lying around so I might just end up doing something similar to you.
Wow! I want to upvote, downvote and report you at the same time. Kudos!
In the end all i did was leave this lousy comment