extremely slow!!

It is a very strange UI/UX, mostly for converting into MP3, not for video

It's a joke. Doesn't work.!!!!!!!!!!!!!!!!!!!!!!!!!

720 максимум! дальше только видео...

Worked perfectly; now aborts _every_ time

It's a joke. Doesn't work.

I highly suspect this add on of loading malware address which the antivirus catches. Many of the add ons on firefox are dangerous for security; the vpn misuses our facebook and so on.

You're forced to download a lot of crap to make it work correctly, others do the same job better without having to install anything

STILL cannot do video PLUS sound..
will not do ytube 'raw' eg spherical for 360

Do not work: "Batch downloading is interrupted."

Stopped working for me. Again. No more button. Very slow download of all streams and stops unexpectedly.

Extremely complicated installation. I followed the first step in the "About this extension" section, install "native client" (whatever that is) - nothing. I don't really need or want HD - my connection has a data limit - but I decided to try installing the ffmpeg thing too. It hasn't helped. The icon below the video produces a big orange box with only an hourglass in it. "Quick download" (upper right corner of the browser screen) produces a "Please Wait" message but the browser shows no download in progress and if there is one, I have no idea where it's been saved (I looked in all the usual places). The Settings page includes something about an "ffmpeg path" with a box that's empty; maybe it's supposed to have something in it but I don't know what. I don't understand most of what's on that Settings page anyway. This extension may be fine for people with a lot of knowledge of how addons work but that doesn't include me and I'm stumped. From my point of view, basically - it doesn't download anything and I don't know what to do to make it start. I'm removing it.