With the help of this add-on you can download all YouTube videos in just one click. It supports formats like – MP4, FLV, and MP3. So you can download YouTube videos in any of these formats.
Here are some simple steps on how to install and use this add-on,
1. Go to the url,
and install this.
2. When it completes the installation, restart your browser.
3. Go to YouTube.com, open any video and allow it to play for a minute.
4. When the video starts playing you can see the Download button in the page as shown in the below screenshot.
5. Click the ‘Download As’ button where it lets you choose from the options. Select which ever you want to and the download starts.