There is a shelf on the cameraman to fix the camera. What's that thing called?

That thing is transliteration of the camera stabilizer.

The function is to reduce the vibration in the process of moving shooting.

Large events are widely used. For example, in the just-concluded Olympic Games, there will be at least one end of 100 meters.

After the first place hits the line, follow the athletes to shoot.

Athletes usually jog or walk and wave to the audience.

At this time, the photographer should follow. If you shoot on your shoulder, the camera will inevitably shake with your footsteps.

Camera stabilizer can greatly improve this problem.