Ingagi

Ingagi is a 1930 pre-Code pseudo-documentary exploitation film directed by William S. Campbell. It purports to be a documentary about "Sir Hubert Winstead" of London on an expedition to the Belgian Congo and depicts a tribe of gorilla-worshipping women encountered by the explorer.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.

Poster by Congo Pictures (Public domain).