Except, if you're in a town that only has a McDonalds, and you violate the rules of being at said McDonalds, and McDonalds says you are not welcome here, then g

Except, if you're in a town that only has a McDonalds, and you violate the rules of being at said McDonalds, and McDonalds says you are not welcome here, then guess what? You aren't allowed in. Also: there's plenty of competition for posting videos, including doing it yourself. Your real argument is "I want them to be able to force YouTube to publish what a government official says, in spite of policy violations, because people only watch videos on YouTube". Which is clearly unconstitutional, but let's go with it. Should Fox News be required to provide whatever AOC tells them to broadcast, with no commentary disagreeing with her statements? After all, the people who watch Fox News only watch Fox News - you can't point to MSNBC, CNN, etc as the people who use Fox News only use Fox News. But of course not. The real issue is that these are politicians want to lie about a disease during a pandemic, promote homophobic, transphobic, anti-semitic, and generally awful content, and these platforms have policies that they very clearly that you don't get to class groups as untermensch and stay on their platform.