How is the documentary about wild adventure filmed?

Many documentaries will be noticed by photographers. For people with high risk factors, explorers are photographers. Judging whether there is a photographer, you can judge whether the picture is artificially operated. If the subject in the film is in the picture and the lens has the methods of pushing, pulling, shaking and moving, it can basically be judged that there is a photographer; If the subject is in the picture, and most of the picture is a fixed panorama, it should be that the subject has set up a machine selfie. I saw a movie about a foreigner who tracked brown bears for many years. Many bears almost accepted his existence, but in the end he was bitten to death. This tape was later discovered.