Rated 4 out of 5 stars

It's awesome. It's easy to download, I don't get redirected to another site, and is able to download them in different formats.However, It doesn't appear well in Youtube profiles and channels.
Edit: It doesn't work well when trying to download a lot of files at the same time...

This review is for a previous version of the add-on (2.3.1.1-signed). 

Hi Andy,
Multiple downloads are fixed in 2.3.4 :D. Channels will be fixed in 2.3.5, which should be up for download in about a week. Thanks for letting me know there was a problem with the Channels, I don't use them enough so I didn't catch the problems.