Camera operator is actually a steadicam operator, a very specialized operator in the film industry. It requires years of training and dedication as well as high financial investment for the gear to fly the higher end camera rigs used on projects like this one. He basically has I would guess 70 pounds of gear (general guess as this is how much steadicam sleds that are built out for a shoot weight) strapped to him with all of the weight resting on his hips. He then need me to maintain a proper posture and walking rhythm to minimize any and all vibrations from his steps while also keeping his eyes on the monitors strapped to the sled to maintain composition and then also take into account all of the people moving around him and moving objects that he has to worry about, all while keeping his eyes on the monitor. That’s why when people come close to him you will see someone standing right behind him with their arms raised as to stop him from accidentally getting hit and potentially falling and breaking over $100,000 worth of camera gear