adrimo

When u say expanded what do you mean maybe get a 12 or 15inch flipdown then you won't need additional screens.

On eBay you can get one that will link to your head via aux if u have this then also takes sd cards or memory stick for your films, better than dvd imo

Merry Christmas guys have a great time

I will also be doing something like this.  using the plug in your picture My solution will be 

Composite cable £3 n ebay into a HDMI convertor box £7 on ebay then I will plug my Amazon fire stick into the other end of the box. Power for the stick will also come from the 12v socket and I will use my phone as internet connection.

Other solution is to plug my tablet into the box via hdmi lead

Both solutions will allow anything on the internet or tablet to be viewed

Hth