In my opinion Easy Youtube Video Downloader Express by Dishita is one of the best add ons available.

I don't know what I would do without it.

Quite often, I don't have time to dedicate 1 or 2 hours at a time to watch a tutorial, but with this addon I can download the tutorial and then watch it in shorter bursts as and when it is more convenient for me.

You can also download some of your favourite music and save it as an MP3.

It is so simple to use. You simply click on the 'Download' button, select the quality of download, and decide just where you would like the file to be downloaded. That's it!

It is wonderful.

I cannot praise it enough.