What does this even mean? Are you suggesting a private company should be forced to host content they don't want to? Should Fox News be forced to host Rachael Maddow and a Huffpost show? Is Fox News "censoring" Huffpost by not hosting a show on their network?
Imagine a public town square. Would you want any company acting as the gatekeeper, deciding what speech is allowed or not in that setting?
YouTube, Twitter and a few others are effectively the new town square. I don't think we want to end up in a position where a few corporations are dictating acceptable speech and open debate.