Hello @TeamYouTube , I would like to know, why are not the thumbnails of the videos on my channel? What happens is that all my videos had thumbnails, and now they are no longer seen.pic.twitter.com/10DKNkIopT
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A B testing is extremely common on the web, Facebook has something like 10,000 versions going at the same time. This a fundamental part of web design, and is likely covered under their ToS https://en.wikipedia.org/wiki/A/B_testing …
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