Works well. Quick download. Doesn't ask you where to save the file, so it seems like it's not working. Check your Downloads folder!

GYEREKEK! ENÉLKÜL NINCS ÉLET! HÁLÁSAN KÖSZÖNÖM NEKED feller! PROFI MUNKA.

720p and 1080p don't work

Did nothing.

"filename must not contain illegal characters"

Thanks for the update, now working again in Firefox.

does not work, "signatureLocal" message etc. Being logged in changes nothing.

Error: "signatureLocal: Signature cannot be verified". If you're getting this error you will need to update the plug-in. You may need to login to Google (owner of YouTube) also. Formerly, just logging in to Google was enough. Then it wasn't anymore for me yesterday. On the June 13th I downloaded the update for this plug-in and it worked. I was already logged into Google and I don't know if that's relevant. Good luck to you! It is a great plug-in when it's working!

good

Stopped working recently. Any file I download from YT stops immediately.
Besides that, it is a nice addon based on ffmpeg.

This extension unable to download certain videos.

Best extension for get original files from YouTube.

very good

exelente !!!