So at school many times I will plug an HDMI cable into my MBPro and play a movie on a tv we have. Is there any program or piece of hardware that would allow me to have the movie playing but also allow me to use the computer? What I mean is, when using the HDMI cable it just shows what I'm doing on the computer, so I can't surf the web and watch a movie on fullscreen. Any way I can get the movie to play full screen on the tv while I use the computer to do other things?