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/A7oDmr
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Replying to @TeamYouTube @JamesTurnerYT
It makes the channel look unprofessional and unorganized without custom thumbnails. I dont think any of us want this youtube.
12:46 PM - 28 Jun 2018
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