I've been using this add-on for nearly 3 years and it has only gotten BETTER every time YouTube decides to change it's site, for whatever reason. This developer is quick to make sure that the new layouts/options presented work with their add-on. With the amount of times I've use this add-on, the developer deserves much more than the 'cup of coffee' that they ask for! However, it should be noted that the basic functions WORK and are FREE! It's only the Ultra-HD and Ultra-KBPS audio that they are a donation for.