The honest truth of our society today is that whenever anyone puts themselves out on any social media platform they are subject to bullying, whether they're disabled, in the spectrum or an average person.
That's because no matter what, there are always going to be people who think it funny to taunt, bully, flame troll, etc etc etc.
They do it for various reasons, jealously, hate, boredom or they just want to draw attention to themselves.
But these people are usually cowards, if they see someone drawing a lot of support and know that if they start a scene they'll have an entire community of people telling them off then they won't start any trouble.
Trust me, people would bully guys like Pewdiepie and Mr. Beast if those two had hardly any subscribers or supporters.
My advice to you is to do what makes you happy. If you're happy and enjoy doing youtube videos then do them. It's entirely possible that you could pick up a hater or two, but if you show them that they can't get to you and that you're not afraid of them then that makes them the loser and you the winner.
A social media bully only wins when they stop you from expressing or enjoying yourself online.