Audio is taken from an incident where a group of Tehran University students had formed a small gathering on campus in protest. A member of faculty, Hosein Izadiar, approaches them, telling them he will open the gates to security forces if they do not leave. He also threatens them with taking their students ID cards and persumably passing them to security forces.
In this instance, Izadiar shuts the students in, attempting to take their ID cards.
This is one of many instances of university faculty and school staff threatening students with arrest and persecution.