Its good just wish they had separated downloads for sound only and video only like one I had a long time a go. It was separted by choosing something like mp3 for sound only forgot all the format selections.

Update Sept 29, 2021:
This developer is the best. He successfully works very hard and quickly to keep this addon working while YouTube frequently changes its code.

Original review from 2018:
For 10 months, I have been using the 'Easy YouTube Downloader Express' in Firefox (currently v61.0.2) on the iMac (macOS Sierra 10.12.6) without any problems. The downloaded video is always good quality. There are several great features this addon sports. Unlike KV 'All Video Downloader' you don't have to go to another webpage with the link to download your video. And unlike Video Download Helper, to select your download format you don't have to sort through a long drop-down list of various codec choices, mixed with lots of jpegs and with other media files. In this Web Extension (aka Addon) the choices for download are consistent from one video to the next. It doesn't require thought or promote confusion. It has downloaded videos the other downloader addons could not. I am very pleased.

I like this add-on for Downloading Videos, But HD Videos not able to download from it. Thanks

It really takes a lot for a 5 star review. This extension is really nice. During a planned flight I download I'll download 3 hours of video for my iPhone. The quality is very good, very easy and you get a stand alone file. In all, a winner.

easy to use, and simple also works for me.

I had a few videos that wouldn't download, or would download as 0 byte files. After a repeated attempts, they did successfully download. Glad for this software. Will try it out a bit more. Don't love that some of the downloading options are walled off "freemium" style. I understand the costs of infrastructure, though I' m not sure I will use it often enough (a few times a year) to justify a big donation...

es lo lo mejor para bajar videos

Its so good!

So far it works great!

Works fine, well integrated.
Read description untill its end, downloading 1080 video is a PRO feature.

bueno

puedo descagar todo.. :)

Very Good...

I PAID , i'M TRYING TO SEE IF 1080 WILL WORK NOW , WILL UPDATE IF IT DOES !

It is very fine and superb addon. Thank you developer.

superb

Really good video down loader.

This is a great add-on to have! I would give it a 5-star except there are several formats not available on the free version that are commonly used. It would be great to have something like this for other video platforms, like vimeo, etc.