system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How did the nature documentary planet earth get such incredible footage ?

Are the cameras planted? Some of them it feels as if the camera was on the animal almost- it's amazing that the animals are not bothered by the cameras.
gpt
Start with really good camera's and phenomenal lenses.   Add in a good documentary cameraman.   Tell him to go film nature for a year.

Then trim out 99.99% of the footage and cherry pick the most amazing shots.