Very clear, easy-to-use add-on. On my very first download I ran into the upgrade wall but that was explained properly and worked well. Unfortunately, I misunderstood originally and ended up getting a Premium YouTube trial, that I didn't really need. If I end up using this frequently, I will certainly make further donations.
Have now been using for over two years and the extension continues to work well. Highly recommended.
Updated 2021-06-23