Earlier quoted context omitted.
I am unsure of your argument. Are you saying that the size of the company factors into what policies it can enforce? i.e., smaller companies can have more freedom in policing content, but if an undefined critical mass is reached (perhaps market share), they should have less flexibility on curated content? Or is it a factor of what it's trying to build? e.g., if YouTube only focused on hosting political content, shoul…
GP argument is similar to the common carrier argument. Some communication channels (e.g. post, telephone, and maybe YouTube) are so pervasive, important, without comparable alternatives, that they should be considered as common goods and regulated as public services, rather than private companies. In particular freedom of speech applies to their users.
As much as I dislike YouTube’s policies in general, I find it difficult to argue against their current actions simply because powerful entities are already abusing the system behind the scenes to moderate content themselves.