According to the video:
American model of free speech, which largely rejects hate speech laws, is essential because governments and institutions should not have the power to decide which ideas are acceptable. They argue that restricting speech does more than silence offensive opinions, it shapes what people are able to think, discourages open debate, and makes society less resilient by suppressing controversial or unpopular viewpoints. While acknowledging that hate speech laws are intended to protect vulnerable groups, the speaker contends that in practice such laws mainly protect the authority and narratives of those in power. They conclude that true intellectual freedom requires allowing even offensive or unpopular ideas to be expressed so they can be challenged rather than censored.
Free speech means the government is not allowed to censor your speech.
Free speech does not mean you have carte blanche to say whatever you want with zero consequences, and those consequences may involve getting curb stomped by people who are deeply offended by reprehensible things you say. There is nothing in any social contract anywhere that says you can say literally whatever you want without any consequences whatsoever.