I'm not a poster to Youtube, but it was always my understanding that it was like here, not a democracy, they control what can or can't be posted to it. So if they have a moderation group that monitors it, they can delete what they see as not fit to be seen.I'm on the fence regarding Youtube's censorship strategy... I understand why they do it... misinformation kills people...
But on the other hand, censoring something also draws more attention towards it.
People seem to think the first amendment covers every thing anyone wants to say, and that it covers the public or a company from censoring or not allowing things to be said. That is NOT what the amendment says, it says CONGRESS can't stop a person, not a private entity/person.
"The First Amendment guarantees freedoms concerning religion, expression, assembly, and the right to petition. It forbids Congress from both promoting one religion over others and also restricting an individual’s religious practices. It guarantees freedom of expression by prohibiting Congress from restricting the press or the rights of individuals to speak freely. It also guarantees the right of citizens to assemble peaceably and to petition their government." A better read is here - https://www.law.cornell.edu/constitution/first_amendment