The video and audio are usually out of sync. while the original plays just fine. Also there seems to be frame skipping or bad stuttering after the downloads complete. This app is pretty much broken.

Does not support 1080p or 4k. It's Trash.

Videos are downloaded full of glitches and out of sync, used to be good.

NOT Free!

This add-on doesn't work with Firefox's latest version. It did download Youtube movies but stopped at 99% forever. I tried another add-on called Easy Youtube Downloader Express, which works fast and has good results.

The download icon never appears!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Donne toujours error et ne s'installe pas correcteemnet

Horrível. Não está mais funcionando direito

Probably the best add on there is on Firefox. Awesome!

For many months can't use even 1 time without problems

needs additional app. useless