Even if Vidme becomes this bastion of unmoderated speech like you're suggesting, here's what's going to happen:
Vidme gets a reputation for this. Only people who actually give a stuff about what you're complaining about (i.e. people on the alt-right) are charged enough to make a jump as significant as this. Youtube is one of very few places where you can make a career out of content creation, and you'd have to be really politically motivated to put so much on the line like that. If you're that politically motivated, your fans will probably align with your politics very much as well. As voat is to reddit, vidme would be to youtube.
Then advertisers wouldn't touch Vidme with a twenty foot pole, because of this reputation. It would either shrivel up or maybe be sustained by financial help from users of the website.
My question is, what has Youtube done specifically to JonTron/PewDiePie? I was under the impression that PewDiePie was dropped by Maker, and all of the backlash against JonTron has been by individuals, not Youtube. I'd be glad to see both of them go honestly but I'm having trouble understanding the reasoning.