Yes. You need someway to get the video on your Nav screen. I just installed the NavVideo from Gnetcanada.com
It got here worked great no cutting of wires and I have used it for DVDs. The bonus to one of these $300 devices is it also has an input for a reverse camera. So you can get a much cheaper plate cam or I am going to get a KAYA and make a custom mount under my rear handle. Total cost of that should be less than $60. So for around $400 you can get a reverse camera and DVD input on your Navi screen.
I started another post and when I get a Honda factory heated seat switch on Monday and finally order a camera and install that I will post some picks, but the basic install for the dvd was very simple.