I have a 55" TV at my house. Connected to it, is a box, that gets signals sent to it through a system of satelites in outer space of thousands of different channels to watch. This box, can record up 1000 hours of programming, before any sort of external hard drive is connected to it. I can pre program it so that I can watch any show, on any of these thousands of channels that I have, whenever I want. Sometimes, I have to watch these channels live, and can't fast forward through commercials.