All cameras have to be held steady so that the pictures produced will be clear Originally, movie cameras used to have to run on rails similar to those used by trains to keep them steady. Steadicam is a system that allows a video camera operator to move around freely without the picture becoming wobbly and unsteady. It has a harness for the camera operator and a system of springs and levers to absorb any sudden movements. It works something like the way the suspension of a car does.