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.
There are times when the thumbnail helps provide more content, like @becausescience.
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I was honestly kind of annoyed at the inability to create a custom thumbnail a few years ago when I first started making YouTube videos on a different account. Please don't take away the custom thumbnail. It's more than just clickbait. It's a rhetorical device and an art form.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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