Earlier quoted context omitted.
What law says I can’t give you an incentive to stop badmouthing me? According to this link, defamation - written (libelous) or verbal (derogatory) - is a civil matter and not a crime. https://www.nolo.com/legal-encyclopedia/defamation-law-made-...
See this page[1] for a detailed explanation, which explains that under most extortion laws, the threatened act may be perfectly legal (like leaking photos of someone in a compromised position). It becomes illegal if the threatened act would "harm" the victim and you demand money in exchange for not doing it. (Legally, harm has a very broad scope, and can include loss of reputation.) [edit] Note that what this YTer is…
The guy posted an opinion. The company weighed the costs of refuting his opinion or paying him to shut up. I don’t think this is blackmail or extortion. How an opinion can be construed as defamatory I fail to see.