Used to work all the time, but now whenever I try to use it I get an error saying "Cannot detect url_encoded_fmt_stream_map, adaptive_fmts or adaptiveFormats"

This is the most consistently reliable add-on for downloading YouTube videos and doesn't rely on external conversion sites or extra software. Occasionally, there will be some update (usually on the YT side) that breaks the feature but the developer is impressively responsive in fixing the issue. One of my must-have add-ons.

Great inteface. Easy to use. Uses the library for download progress.

This is a great add-on. I have used it for years to extract videos for my prison ministry. However, like Devilshaker, it has stopped working for me. I also uninstalled and then reinstalled the add-on. This worked that last time I encountered the cannot detect url_encoded_fmt_stream_map... but not this time. Perhaps the developer has not yet fixed the current version for this occurance of the problem. I hope it gets fixed soon.

not bad seems to get the job done.

muy util para descargar videos y audios de youtube exelente

fast download,just perfect!

nice addon!!

First downloader to actually work & let me download YT videos as MP3s through a built-in converter.

This works. No need to look elsewhere, fellow collectors. I'm not a shill, it's legit. I'm talking about YouTube Video and Audio Downloader (WebEx). I added that because I see a lot of reviews that say "good add-on" and could be reviewing anything.