What does the word "abnormal shooting" mean in TV news?

The word "abnormal shooting" in TV news means that there is no aboveboard shooting, so it means taking pictures secretly.

Shooting is to record images of people and things with cameras and video recorders. Different scenes have different shooting techniques, including night scene shooting, rain scene shooting, building shooting, portrait shooting and so on. Film dynamic art shooting is also a kind of shooting, but it must follow certain principles. With the progress of science and technology, shooting has become more and more simple and popular.