This is true of a lot of nature films as well. I got first hand experience of this working as a field biologist in Panama. We had several well known film crews

This is true of a lot of nature films as well. I got first hand experience of this working as a field biologist in Panama. We had several well known film crews come through where I worked. Trapped animals (temporarily captured for research reasons, it would be highly unethical to trap animals just to film them) were filmed in cages with natural looking backgrounds was common. Several segments involving larger animals were filmed at a local zoo. Insects were often "tethered." A very thin clear plastic thread was glued to their bodies and attached to another surface so they could not fly again. One group wanted to film a tree fall in the forest, so they cut down a tree after attaching several cameras to it... It was an eye-opening experience for me.