I have a 2014 with an Alpine RSA10S-R-SE 10.1″, I don't have any region 2 DVDs to play in the head unit (tested region 4 and yes didn't work). I plugged a portable DVD player into the aux video in (base of the centre console) and while the soundtrack played the video content did not. I mucked around with different setting on the monitor and head uniy but nothing changed.
One win is that I changed the language on the head unit to English and got rid of the default nivi screen and the womans voice telling the etc card wasn't inserted everytime I started the car!