Sharing answers to top q's we’re seeing about the thumbnail experiment: – Custom thumbs aren't going away – 99.7% still see the creator's custom thumbnail – A lot of creators use auto-generated thumbnails, this test helps improve them for those using them: https://goo.gl/A7oDmr
Hi youtube, Most of the thumbnail created are clickbait, Why cant you have scrubbing preview on thumbnail, so the click bait videos will be weeded out by users and it won't affect genuine creators.