None of the support contact information appears to be currently available, either on their website or via firefox ad-on. Had to get a new computer due to the old one crashing. Used/purchased this back then, now not so much.

Keeps asking me to download Pro edition when attempting to download some things sometimes. (Youtube switched to separate audio/video streaming technology for higher quality formats and no longer provides direct 720p (Since 24 September 2018)/1080p/mp3 streams. Converting these streams to downloadable formats for you needs powerful server infrastructure, therefore 1080p/mp3 downloading has been limited to PRO users. Read more at - https://videodroid.org/pro_upgrade.html. FREE users can download all formats in CACHE where some PRO users fetched the video/audio in past 24 hours, to test the feature you can try downloading popular videos.) That's really annoying. Other than that it's OK.

18.3 dont work in debian or fedora

For the past three or four days, "DOWNLOAD AS" does not appear. It shows up only now and then
Srinivas

No longer works for MP3...

Doesn't allow you to download mp3 format if your not a "pro". But at least works in general

Great when it works. But downloads frequently stall and must be manually restarted, repeatedly, to complete download of a large file. Auto-resume would be a nice feature to add if possible.

mp3 isn't working due to a change by youtube?

Apparently it does not work for MP3 files. Maybe youTube changed something. It works fine for videos, so I'll keep it. Thanks!

Unfortunately it not longer offers to download the 1080p HD videos without some pro account...

Great add-on normally, i lowered my score slightly because with the latest update, the ability to rename the video before saving is gone: no pop-up dialog box appears when pressing the button

It works, but practically only for 720p video. Does the job if you really want a downloader browser extension, but it's really limiting otherwise. I'm not bothered that mp3 is limited to a paid feature, it's easy enough to convert video files to audio only. What does bother me is the lack of 1080p or higher downloads.
Their excuse about needing "powerful server infrastructure" for 1080p+ downloads is a weird one, considering this is all done locally. You could convert to mp3 locally as well, but that's whatever.

All in all, it works. But you're better off just using software that lets you download as you please.