Recording your games free

Basically today i found a cool program that lets you record your game play "or whatever you want" free, and with some surprisingly nice quality and it can pick up sound just through your speakers -no microphone needed- so ill give you guys the link to the website
http://camstudio.org/
and a link to a youtube video explaining how to use and download it
http://www.youtube.com/watch?v=Kiug3H3c4gk
Enjoy, lemme know if you guys have any questions about it.