@TeamYouTube alright, what kind of trickery is this again? I have been able to upload thumbnails up until lately. There are no strikes on my account to my knowledge whatsoever. What's the reason for that?pic.twitter.com/j5VpAfWAKh
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That's odd – if you haven't completed any troubleshooting steps yet, this can help: https://yt.be/help/sWdH If you're still having issues, share your channel's URL so we can take a look and point you in the right direction. Let us know how it goes!