Hi, would anyone know if there are unused video inputs on a 2010?, I know that u can get the GVIF thingy, but what if u already have rear camera as standard, but say no DVD player? does that mean that there is a spare video input unused somewhere? - was thinking of a front camera (having played with full surround cameras before )

Not unless you have factory RSE because the inputs are contained in the units that replaces the aux in socket
What you could do is try splitting the original camera input with micro changeover relays no plug and play solution that I know off