Used this add-on for along time and it has been excellent. Since a few days the green download button is not appearing. I contacted the developer and the latest round of YouTube changes have broken the add-on. He was super-friendly and is already working on a fix. I'll have to have a bit of patience but hopefully in a few days the new version will be out. Pity that it's led to so many negative reviews here when it's not really the developer's fault.