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YouTube adds new hurdles for ad blockers, and there's currently no way around it
(www.androidauthority.com)
This is a most excellent place for technology news and articles.
The issue is with your ad blocker, not YouTube, though YouTube has no incentive to tell you what is going on as it would help out bots trying the same thing.
I don't like Brave but they seem to have gone to the effort of whitelisting the heartbeats, so use that for YouTube comments.