YongYea caters to the toxic gaming community by sharing clickbait videos that stir up nonsense and spread misinformation. He's a popular gaming YTer in the alt-right community for "telling it like it is". He's a few shades off from The Quartering. Also, he defended PewDiePie when he got caught saying the N-word on livestream. YongYea said on his follow up video that "black people say the word all the time" and that it was OK.
After the release of MGSV, the dude was struggling to stay relevant, so he resorted to diving deep into shitty gaming commentary videos about whatever rumor or video pops up on the r/games reddit in the morning. The guy is a complete scumbag and tool. So fuck him.
It's interesting you say he caters to a toxic gaming community, whilst simultaneously calling him a scumbag and tool, and for what, in your examples, defending PewDiePie's admitted mistake, having clickbait videos and having some alt-right viewers? Do these things really warrant deeming someone a scumbag?
In case you didn't realise, a massive portion of the entire world right now leans right or is alt-right, so him having some or many alt-right viewers is wholly unexpected. Unless YongYea is alt-right himself, and there's notable examples of as much, it's seems a bit weird lauding that over him.
I personally lean strongly left, and whilst I've only watched maybe a dozen or more of his videos, he's never come off as especially toxic or as alt-right. Instead his content is pretty typical of the pick up every piece of news out there YouTube gaming tact.
Perhaps I just haven't seen enough, but based on your examples (or should I say lack of them), I have to wonder if this is a case of what Obama was discussing in this other thread.
Obama on 'Call-out culture' - "The world is messy. There are ambiguities. People who do really good stuff have flaws."