hey @YouTube @TeamYouTube , you should make an option for user to hide or change some video thumbnails (just for ourselves of course).. because some videos have too scary thumbnails, and sometimes I couldn't sleep because I accidentally saw a scary thumbnail at night :(
We're continuing to make updates based on viewer feedback, so feel free to submit your feedback here: https://goo.gl/RsxqYN . Thanks for your suggestion!