公共場合可以，但有限製；如果把視頻貼上油管可能會有侵犯隱私；First Amendment vs Privacy

In the US, there are several laws and guidelines that affect the ability to take video in public, including:?

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• Constitutional right

  The First Amendment protects the right to record and share things in public, as long as they are plainly visible.?This includes recording police officers, federal buildings, and transportation facilities.?

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• Privacy

  People should not expect full privacy in public, so recording in appropriate settings is generally permitted.?However, there are some places with expected levels of privacy, such as bathrooms and dressing rooms, where recording is not allowed.?

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• Consent

  In some states, you need to get consent from all parties before recording a conversation.?

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• Disruption

  If someone is being disruptive, such as by using profane or abusive language, they may be removed from a public place.?

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• Security

  Security purposes may justify recording in a place where people have a reasonable expectation of privacy, as long as notice is clearly posted.?

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Despite these laws, law enforcement officers may ask people to stop recording in public places, and sometimes even arrest them.