The best add-on for video downloading from YouTube and many other streaming sites. Also, one of the first, if not the first, to fix downloading high-resolution content from YouTube after the lockdown. It's good to see an add-on this useful to receive active development.
On the practicalities: it's easy to use -- if you can click a button and choose a resolution in the menu that pops up, you're good to go. Several options available from the get-go, but some of the higher resolutions (or bitrates in the case of audio downloading) are locked and only available to donators (who then get the Pro Version). The Pro version actually provides good value in the effortless procurement of FullHD (and up, if available) content -- but even if you're content with 720p the Pro donation option makes sense to help out with server cost (which must be immense) and software development. A clear and convinced recommendation by me!