2021. I've been using this add-on for 10 years plus now and it works superbly.
Youtube often revises it's encoding and the Easy Youtube Video Downloader Express creator really hops-to and brings out fixes very quickly. Top marks.
Having tried others, Dishita's app leaves nothing to be desired. It'second to none.
It has provided me with many hours of wonderful music video downloads off-line.
The quality of so much material out there, video and audio is just fantastic. There is such creativity and information and this app, the developer's support and the super Firefox platform makes access and archiving a breeze.
Definitely try this one! Once done you are unlikely to search for another.