Yes you could film in both of those situations. The law specifically lists law enforcement activities as making an arrest, questioning suspects, and dealing wit

Yes you could film in both of those situations. The law specifically lists law enforcement activities as making an arrest, questioning suspects, and dealing with emotional situations (edit: specifically emotional or disturbed person exhibiting abnormal activity). Also, if you are part of the law enforcement activity, you are allowed to film. So yes, if a cop walks up to you yelling and you are at least 8ft from the law enforcement activity, you are legally allowed to film.