Try Wantyoutube.com: How to download your personal videos online

Wantyoutube (and MORE) is a good method that is able to download Youtube and Tudou online. If you want to download now, you can add a "want" in the URL to rip off your favorite video clips!

For example:
Youtube - http://www.youtube.com/watch?v=iCtZ8EMVJ60
change to - http://www.wantyoutube.com/watch?v=iCtZ8EMVJ60

Tudou - http://www.tudou.com//alM0tqYD-ig/x
change to - http://www.wanttudou.com//alM0tqYD-ig/x
(PS: Tudou is a Chinese video-sharing website.)

Then, press ENTER, you can get your personal Youtube or Tudou videos. Good luck!

Or go to the homepage: http://www.wantyoutube.com/