It depends on how many inputs you have on the TV, but if it's even fairly newish, you should be OK. Do you have cable/satellite now, and how is it connected? I'm guessing that is going to be going through the DVR, right? You'll probably have one hookup that is cable-to-DVR-to-TV, and a second one that is DVD-to-TV, and your TV controller should have a menu that lets you switch your picture source between the different incoming lines, if that makes sense.