Говнище. Не работает
Спустя два года по-прежнему не работает. Говнище.
ClipGrab рулит

Aplicativo demonstra ser de uso publico, mas é pago

very poor extension. Don't install

Need update...no work 720p videos

This Extension has never worked for me, and now he has another version he says will work. Do I need to uninstall the old version before I install the 15.7, or can I just install it?

Good for low-definition but when I tried to download a 1280p gave me this SOB story in a massive pop-up:

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.

So, yeah, I simply tried a different Youtube downloader Add-On and 1280p was no problem for it at all - no SOB story or asking for money, just quick 1280p download.

Dishita, you have been uninstalled.

ничего не качает, только предлагает купить прем

Getting a zero (0) size file download. Broken for quite a while now, with others having same issue. Have emailed support and checked website, but no mention of a fix in-progress. Shame, because when it works, it's does what it says. Often breaking, though - which may or may not be creator's fault.

MP4 360p und MP4 720p:
Button text "pls. wait, this can take time..."
Download attempts lead to a file with size 0.

MP4 1080p (Full-HD):
Works, but sometimes with and sometimes without youtube file names.

On the so called support page it says:
"UPDATE 01-JULY-2019 : A fix v 15.3 for downloads stuck at "Pls. Wait" message is now fixed and pending mozilla's review and approval, this is expected to take upto 48 hours. You can check for latest v 15.3 here - https://addons.mozilla.org/en-US/addon/easy-youtube-video-download/ ".
The update is still not available today (11-July-2019).

nichts zum downloaden von Videos vorhanden.

This is what I'm getting when simply trying to dl mp3 128Kb from YT. I call BS. They just want money, straight from the start.
"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."

**SCAM** Downloads non-functional, 0 byte videos. Apparently the developer has abandoned support for this add-on but is still accepting donations. I recommend using Video DownloadHelper or Youtube Downloader, both of which (at the time of this writing) are functional and free.