How to record on TV screen with web cam?

If you want to record game play i would suggest having a very good cam to do it as i have seen some game play videos on youtube which are shocking and look too dark, too light, hard to see etc. My personal answer i would give you is to get a cam corder or purchase a very good quality cam from a major eletronics store in you area. But before you buy make sure you look at specs and do research. With this in mind i would say it would be a terrible idea and i would use an actual digital camera with atleast 10 megapixels to record with. I myself have a Sony Ericsson C905 and that has an 8 megapixel camera and i would rather record with that than a cam for a PS3 or computer.