I believe it was in the 1930's.
The first documentary was created by Robert Flaherty. It documented the Inuit people living in the Pacific Northwest.
It was 1922 that Flaherty created the non-fiction narrative film about the life of the Inuit Eskimos in Northwest Canada. Their life was harsh as shown on the film.
moving to higher ground because of natural disasters, building houses high up to avoid threats from other humans, animals etc
