I surprised they didn't even mention jdownloader on the list. It's great for most sites.
Seconded on jDownloader. Still works on an ancient system with Java 1.8.0_66, and able to install the latest updates. Covers so many platforms, not just YouTube.
Seconded on jDownloader. Still works on an ancient system with Java 1.8.0_66, and able to install the latest updates. Covers so many platforms, not just YouTube.