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
No this is not a good idea. For all I care this is a bad idea doing this will harm the clicks that a video get and also could we at least have an option to use "auto" thumbnail? forcing this does make the creator's happy it makes us feel force and lazy.