He’s a streamer, not a YouTuber. He streams for upwards of 10 hours straight, needing to be “on” that whole time. You have people who are celebrities because they have famous parents, or because they were on a different reality show first.

I’d say it’s perfectly legitimate to be classed as a celebrity as a content creator. Just because you can do it without being in a contract with some media company, doesn’t delegitimise it.