I found an even better site guys! Check out (http://vixy.net/) where you can simple fill in the URL and then it will auto convert and download into your chosen format into your computer!!! And it's all free!!!! WOW!!

If you like more links, go to (http://www.makeuseof.com/tag/downloadviewing-and-converter-tools-for-youtubegooglevideo)
where someone has kindly listed every single way of downloading, viewing and converting YouTube files into your computer.

Loving it! =0)