You've just seen a video you YouTube that you just have to have. You don't want to just share it, mind you, you want to own it – safely on your hard drive. What to do?
Well, copyright questions aside (and there's a difference between personal and commercial use) you could partake of a couple of nifty little programs, one called WM Recorder and another called VideoClone, both of which are different ways to capture those videos onto your hard drive.