I find the autoplay so annoying because it hides the thumbnail which was carefully designed to communicate why I should click on the video and replaces it with, usually, a talking head or stock footage. Often the video gets inexplicably added to my watch history, and if I do choose to click on it I have to go back to the beginning because I missed the start of the audio
By all UI logic this should not scroll as this element is not scrollable (it's the top bar above the scrollable content), but YouTube and Google in their infinite UX wisdom kept the scroll mouse events go behind the hovered element. I won't complain about this one too.