The stall is not a penalty. It is the result of a test that did not go well: the thumbnail did not earn enough clicks, or viewers left too early. Fix the packaging and the intro, and the next test runs on better numbers.
Why do my YouTube views stop after 24-48 hours?
YouTube shows a new video to a small test group first, mostly people who already watched your channel. If clicks and watch time in that group are weak, distribution slows down and the counter stalls.
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