Dear @TeamYouTube, I spend time making thumbnails for my videos so that they get more views on your stupid platform. Please use them. Auto thumbnails are a bunch of horseshit and actively reduce view counts.pic.twitter.com/z4TNGAFJfn
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Yeah I always do this. Haven’t had a issue until CES content this year. 
We've also noticed this. Not sure if correlation, but attaching the thumbnail during upload has never failed for us. That said, no one knows what the Almighty Algorithm is presenting us versus viewers.
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