This add-on is working with a moving target. YouTube continuously changes its code to make it harder and the add-on programmer then must figure out what they did and then how to work around it. When he gets it updated, it easily saves both videos and audio. I like the interface. Your browser "download" page does not show the download since the add-on is using a different method to avoid some problem. But the files come quickly and I can watch them later when I am in a vehicle or waiting someplace. Thumbs up.