system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 how nature shows are filmed.

I was watching a polar bear show where they showed a wide angle shot of the bear chasing a seal and you couldn't see a camera anywhere else; the next frame was from the polar bears point of view. There are a lot of other things I couldn't explain.
gpt
Look for "Planet Earth Diaries" on YouTube to see some behind the scenes footage of a high budget nature doc.

Also keep in mind that these docs tend to play a lot looser with editing than you are allowed with normal shows. If you cut from a shot of one human to a shot of a different human from another day, we notice. Do the same with a bird or bear and it just looks like a cut to a different shot.