Wikipedia disagrees with your definition of Censorship: https://en.wikipedia.org/wiki/Censorship

"Censorship can be conducted by governments, private institutions, and other controlling bodies."

Censorship =|= free speech. Free speech is a right guaranteed by the state, what Youtube is doing is more resembling a news paper refusing to pick publish certain readers letters. Freedom of speech is not supposed to guarantee you the maximum possible reach or to protect you from the consequences of ehat you said, social and professional.

But did WHO make the original claim based on sound evidence or trying to appease a certain government? Taiwan disagreed with that assessment early on.