Why you focused on his expression? Some peoples have aggressive speech in blood, some not.
We are not in kinder garden - I agree but still many even "Big" people here behave like this it was.

Some creators create shit not content, they wanna fake engagement because upvotes. Why many people don't accept that? It's like Kim Kardashian - She is successful but she don't have any talent etc. - she is just famous, nothing more, she produces cash for other peoples so they keep promoting her.

Equality is not solving problem to create here something bigger, you have to lose you warm house and safe space to do something better.

His speech was full of aggression and that is shame I hope that you are over it as better person , but that aggression didn't come form nothing. He have points about boring and low quality videos of people who think that thy produce quality because they will tell "Keep it smile!" Like millions before them.

I can't watch DTube videos because mostly they are the same, there is no content - As my interest I wanna see videos about cars reviews, opinions and how to repair them, about games and I'm talking abou gaming shows and reviews not let's plays I have Vimm for that. I wanna peoples who know something, they have skills and they wanna show them, but currently DTube is only full of vlogs with the same topics.

If psychologist will tell about same stuff but in interesting and intelligent way that is content, he can show proof why we behave like that etc. BUT 30 times video about "Don't be jealous, keep it smile and be positive" Is not even half of good content - One time - ok, but 30 times and more?.
YT is greate example here. Copy and paste content from DT to YT, and there will be truth that no one cares