I have no issues with this app. These guys deserve a fee. Or I guess a donation.

It seems to work except that I get video and audio in separate links but not both of them in the same link. There seems to be a bug. I hope that you fix this bug. I have used it before oft and on.

Version 1.1.2 - "Unable to retrieve video metadata" (with Firefox 82.0.2, released October 28, 2020)
Worked perfect 'til previous version, last used on October 26, 2020 (with previous Firefox)
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Installed old version 1.0.9 again (with Firefox 82.0.2):
"Error parsing info: Cookie header used in request, but unable to find YouTube identity token"

If you just logged out from your youtube account, its work to download, if you log in its not work.. When download its start download 2 times same file, but it ony save one (dont abort). If you use about:profiles and start a new user in new windows, and dont login to youtube, its work normaly. I have try this now and working.

1.1.2
"Unable to retrieve video metadata" o(╥﹏╥)o

In the latest version 1.1.2 it works again. Thank you.

Is is working again with Firefox 83.0

so 5 stars again.

Still not working Version 1.1.2 - "Unable to retrieve video metadata" (with Firefox 82.0.2, released October 28, 2020)
Worked perfect 'til previous version, last used on October 26, 2020 (with previous Firefox)
"Unable to retrieve video metadata" (with Firefox 82.0.2, released October 28, 2020)
Worked perfect 'til previous version, last used on October 26, 2020 (with previous Firefox)

Work's and is free

Works fine after last rev. . Thanks !

Perfect. Single click downloading of a video. Works flawlessly.

Today it not working . 1080P video only 0Byte . not to download it.PLZ check it ,thx~~

Awesome Add-on! I'm using this one for yrs and it works tremendously. Every now and then, after some YT or OS/Browser changes it did not work for a couple days (I think the longest was about 2 weeks) but after the next update it worked fine again. The recent pathname error was fixed with Version 1.1.2 and despite some claiming it didn't work on music vids anymore it actually does work. Tested it and had no issues with any vids so far. Thus I wrote this updated review.

Update 6.12.2020:
Concerning review from Rastan / 06.12.2020
I had exactely the same experience these last 3 days. Tried installing older versions also combined with older Firefox ver. but always ended up with the same error message so far. I trust that the add-on is fixed as usual within a reasonably short time. I'll keep updating this review when it's fixed or in case the problem should persist.

Update 7.12.2020:
Addy works again. Haven't tested widely yet but a quick test showed I could dl and chose the format I wanted this morning again. Will update again if necessary. Thanks to others who update their reviews too and sometimes share tips how to circumvent a problem for the time being.

Update 8.12.2020:
Doesn't work again now. The same friggin error shows up. To the dev of this addy: I'll wait like always till you fix it, this tool is just soo effective when it works that I really have no intention to change the addy as long as problems are fixed within days.

Issue with dloads was resolved within 2 weeks. Now working fine again. Thank you.