Download video from Youtube just press a single click

You can do it easily by using Firefox browser. But, to download youtube video, you have to install firefox add-ons. The process of install Add-ons-

1. Tool>>Add-ons and click on Get Add-ons.
2. Search fast video download.
3. From the search result first search result add to firefox and install it.
4. After install restart firefox browser.

Now when you load a youtube video, you can see right side's of process bar [Download this video] icon. Click the icon and save your favorite video.