use this one http://youtubedownloader.org/ just put in the url for example:

http://youtube.com/watch?v=bqZauhidT1w
then download.

it will save it to the desktop normally unless you can change it. the file will be called get_video then change the name file to for example : korn.adidas.mpg
and you should be able to play it through windows media player or download a program called vlc player plays everything from quicktime movies to pretty much every other file extension.

hopefully that helps is the simple way of explaining it.