This extension definitely improves your YouTube experience and I urge anyone that hasn't yet installed this to do it. At first the visual overlay may look strange to you but when you learn what they all do it just makes things better and also the settings is easy to understand and the little box at the bottom of your browser is a good quality of life improvement when watching videos on YT.
Thank you to the author/creator for updating and keeping this extension going, myself like many others appreciate the work that goes in to it!