XPS One TV Input Device Inquiry

Hey there, I wasn't really sure where to exactly post this, as I couldn't find any information online about it. I thought this would be the most relevant forum.

I have a Dell XPS One all-in-one desktop that came with a TV input device that has inputs for Audio/Video, a spot for an 'IR blaster', and a S-video connector. Considering the XPS One can be used to play live TV through the optional TV Tuner, I figured it really shouldn't be a problem to hook up my old Playstation or Xbox and play them as if my XPS one was a TV. I'm assuming that is the general purpose of the TV Input Device, yes?

The problem is that I can't find any information as to how to accomplish this anywhere online. Any sort of input or round-about solutions on this matter would be greatly appreciated. Pun intended. ; )

-Tony