It’s still hard for me to believe that nobody among a few thousands people working on YouTube realises how disgusting Autoplay toggle looks (left). Just remove that ugly shadow and you get +100 to cleanliness the same instant (right). No other element on the page uses shadows anyway, so you get consistency too.
Next step is to fix the toggle shape itself, but that requires taste, so it might be too much to ask from Google. Removing dirty shadow requires just common sense.
UPD: beautiful version from @disablesilence twitter.com/disablesilence/status/1250048928407523329