The US allows just about all expressions without prior restraint. Even shouting fire in a theater is allowed speech until a court says otherwise -- after the fact and with due process.
In contrast, censorship is a kind of prior restraint that restricts speech in the absence of judicial review or due process contrary to the rule of law.
Yeah but it restricts speek on a media plattform. Believe it or not, in the past 100 years it was pretty much the norm, that certain contents would not be published e.g. in books or newspapers.
A lot of the stuff right wing extremists say on youtube today would have been censored on television in the past (depending on the country of course).
In contrast, censorship is a kind of prior restraint that restricts speech in the absence of judicial review or due process contrary to the rule of law.