A lot of it is just months in the field to get that one shot. Maybe even years, and then splicing it together to make a fairly bullshit narrative
Though the Disney Alaska documentary…. With the running of the lemmings (white wilderness).
The scene where the lemmings were supposedly committing mass suicide? Yeah. They were flinging them off a turntable- like the kind used to spread fertilizer or salt.
Well. It did inspire a classic video game. But yeah. Lemmings do run- they just hop down, no suicide.