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
As a viewer i very much prefer the thumbnails made by the youtubers themselves. More eye-catching, plus there's no awkward "in-the-middle-of-blinking" thumbnails that way. Please go back to the way it was.