[zaarn]

Depends heavily on the jurisdiction. In Germany, there would be two parts to this; Panoramarecht (Right to Panorama) and some general opinions of judges.

Panoramarecht means that the girl can film into a crowd or public space for her own reasons if she wants to. As long as she doesn't put one person in the center of the image or focuses on them in other ways, it's generally permitted.

There is also some more general law handling, if you posed for the picture, judges would generally agree that this constitutes consent to be recorded (a more recent case would the famous Angry German Hat Incident, in which a very angry right-wing man walked up to a camera team to complain about being recorded; the judge ruled that the camera team was justified in recording at first due to Panoramarecht and the man walking up to them, knowing they were recording, rightfully so, constituted consent to be recorded further).

Posing to a camera or walking up to it basically means consent in germany; you noticed the camera and you did take actions that would put you center in the image or make you a focus point.