Did not work. Video metadata error. Searched for Kaner extension, which worked.

It is useless, you have three options:
1)download 320p video AND audio;
2)download video BUT NO SOUND
3)download audio but with ads AND JUST SOMETIMES!

Stupid.

Ya no sirve

This add-on is quite good, despite the recent issue I've had with it. That recent issue being that I was unable to download videos until using a VPN to hop to a different IP address. Then, the add-on worked just like it used to in the past. No idea what's going on right now, but hopefully developer gets this issue sorted out in the near future.

unable to receive video metadata
even old version and current version

thanks！

Doesnt Work. But I found one that Does :) Kaner YouTube Downloader >> Look for it GUYS it freaking WORKS :) . And I never write reviews but after one hour Searching I found the only One that REALLY DOWNLOADS!!

The best YouTube down-loader extension on Mozilla Firefox.

Yesterday, Outch? Noooo! Definitively the BEST with a so effective design and suddenly out of order, I can't believe it...
But today, it's OK, sing : It's running again; oh yes, my soft without any pain; oh yes, it's running again; and you know it was hard to extend...thx feller! Super stamp!

perfect

How is this still "recommended" by Firefox when it doesn't work anymore.

"unable to retrieve video metadata", but when you change the IP, it work again.

"unable to retrieve video metadata" is all I ever see. Firefox 83.0