It gets slightly broken if you're going through a playlist on the site. Starts showing phantom buttons duplicating horizontally from left to right as you go through the playlist. One must simply refresh the page to remedy this issue, but still something to work on.

funciona muy bien pero debes abrir y cerrar l pestaña porque de lo contrario descarga el mismo video varias veces

Läuft ganz gut !

I have had issues with the interface until recently, but right now, the current changes are really well-executed and it seems flawless. Waiting to see whether it stays this way...

It has been all good for this downloader
, love it.

i'm glad, thanks!

In chain watch addon is creating another "download" unclickable button so after 10 videos watched in chain you got 10 green buttons. They dissapear after page refresh.

Good and fast downloading...
but some smaller issues are to be corrected:

1) completely freeze all the opened tabs on my navigator, Firefox updated, (not the computer) while converting the video.

2) creates a ghost image of the "Download as" button each time I change the YouTube page.

Not HD, but it works. First download had the wrong language, next one was fine and quick. Think the language problem is the new YouTube auto translate they started doing for everything. So if it was uploaded from Germany, downloading in the US will probably be dubbed German.

So far worked okay on one video, but I have two computers and it only works on one of them. In fact, installing on one computer made it work on the other. I think that's a bit of an issue, as I use the other for work.

Good. Just missing the MP3 option, can't find it.

GOOD

Works for now, no watermarks like VideoDownloadHelper. Will update review if anything mishaps occur

My linux PC is pretty old, and it took a while, but this extension was able to convert and save a 35 minute instructional YouTube video to a small mp4 format. It worked well, but I had to scroll down to below the video to see the progress this extension was making in conversion and saving.
There is one bug - if I click on another YouTube video in the same window, and try to convert and save that video, it doesn't -- instead it downloads, converts and saves the original video I viewed in that window, making another copy of it.
It seems like I have to close FireFox before trying to download another video.

Definitely the best YouTube video downloading extension. I think 4k (or at least 1440p) should be available for donators.