lol the guy on the phone sounds like a bully trying to intimidate someone who they assumed didn't understand their rights. I didn't listen to the tik tok though, so no idea what "defemination" the vlogger posted and if legit.
Not a lawyer, but when you are dealing with a real legal threat, isn't it common practice for the other party to disclose their name (i.e. if its the legal represented, the lawyer would have zero issue saying their name?).
They just handed this vlogger what they wanted- more viewers.
https://en.wikipedia.org/wiki/Streisand_effect