I found his video interesting, but I, as well as many people who have been in the fandom for years, have never (or rarely) came across the toxicity he's talking about.
The way Kothorix has been interacting with the fandom made it so that he would see the dark side of the fandom more often than the average furry would.
When he talked about adults adults preying on teens and children, he mentioned that at 14 he was actively seeking porn and sexual roleplay. Now, while I think roleplaying is as harmful to a teen as watching porn featuring adults (wich is not much, watched lots and I'm just fine), the fact that some adults want to do this with them makes me uncomfortable. And also he said that some were harassing him or trying to have irl sex, wich is not ok. And I'm also not trying to victim blame him. But anyway, what I was going to is that a teen who is seeking out sexual roleplay is more likely to attract creepy perverts than a teen who doesn't.
Most of his examples of toxic sjws were from twitter and tumblr, platforms wich are already well known for their toxicity. And when he says that most of the problematic people were furries, I'm assuming that, as a furry youtuber, most of his followers are furries in the first place. But I didn't look it up so I might be wrong.
He talked about inconstistent rules about what's acceptable or not (like bdsm one day being good and the other day bad), but I think that's just a case of different people/groups believing different things.
When he said that most people prefer toony fursuits because that's what's popular, I'm somewhat sceptic. I think there may be a bit of that, but let's think about what made most furries furries: Disney, cartoons... most of it in a cartoony style. And yes, really good looking toony suits cost a fortune. Top tier makers are in high demand after all.
Speaking about that statistic that 20% of furries consider themselves zoophiles, if it really is accurate, it's possible that there is more nuance that that, because the definition of zoophilia differs depending on the person. Some zoophiles will fantasize about animals, watch drawings of them or videos of them mating with their own species, but would never have sex with an animal or watch people do it. Other people may believe that an attraction towards anthropomorphic animals count as zoophilia, even if there is no attraction to real life/feral animals, too.
And a whole bunch of other thing that is a problem with people on the internet in general, and not with the furry fandom specifically.
Every fandom have some toxicity to it, but it's possible to avoid it to an extent so that it can still be enjoyable.
-- Jasonafex's Journal
