Can anyone help me please? I have a video of an interview, but it was shot in a cafe, and there is a lot of noise (people talking). How do I remove it?

Probably nothing you can do. Boosting the mid range frequencies might work but as the unwanted stuff is also talk I doubt it.

Best to invest in a hand held mic or a short shotgun mic. Correctly used they will avoid a reoccurance of this probelm.

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