If you are facing some problem to download youtube video don't worry here is the solution of this. I heard some people installed youtube downloader to watch video from you tube. But they are facing problem with this. Don't need to install any software to download youtube video. Just follow the following instruction.

Instructions:
1.Open youtube.com
2.Search what you need and open it.
3.Open keepvid.com in a new window.
4.Copy your youtube link and past it in keepvid.com
5.Press download.
6.Choose your quality of download and Enjoy.

Enjoy downloading any kind of video from youtube it's really fast.