This addon has been going for years. Way before the likes of IDM or Youtube downloader. And like a faithful travelling partner, it is still here today to help you augment your youtube internet experience. A few things you get here & not elsewhere are: 1. Addon author is creative, passionate, & competent about enabling access to the videos + audio you require, 2. It’s a firefox addon so – all the governing rules in regards to better processes and privacy are baked in, 3. When there are uncompromising changes at youtube [code etc.] the author adapts quickly & successfully, 5. The interface is easy to navigate even for newcomers, 5. It’s free & safe to use. *Sure, there might be the odd glitch here & there, but keep in mind that youtube really do everything to stop you getting the media. In a perfect world, this mightn't be the case. So..... in light of that, I believe this is a robust solution 😊