My first attempt at having the headrest screens for movies was using one PC with a VGA and a video out.

The video was supposed to play the movies.

However I just found it tricky to get it to work how I wanted.

None of the Frontends really handle multizone very well.

Also you would need two soundcards as well, so I am now moving to having a PC for the front and a second which will do the headrest monitors. (maybe one day if it all starts to work nicely I will use a third PC so the two headrest monitors can be individual.