Looks like you're in a small and brief experiment (.3% of viewers for a few weeks) so you're seeing auto-generated thumbnails instead of custom thumbs. This is part of an effort to test/improve auto-generated thumbnails for the many creators that use them: https://goo.gl/oYoLi7
Hey @TeamYouTube My wife recently uploaded2 videos and the custom thumbnails are not showing... Can you please fix this bug as ut is affecting our engagement.pic.twitter.com/0EZ5uxbbrT
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I've logged in with 10 different account though... So those 10 accounts are in that .3%?
End of conversation
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