We are running a small experiment where 0.3% of viewers will see an auto-generated thumbnail, instead of your custom thumbnail. We are not removing the ability to create your custom thumbnail, but we hope to gain insights on auto-generated thumbnails for the future.
Replying to @_11pixels_ @TeamYouTube
42 holy grail clickbait thumbnailspic.twitter.com/n8ayCnASq1
2:17 PM - 2 Jul 2018
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