Excerpt from the Wikipedia article on "Roosevelt in Africa":

Roosevelt in Africa is a film by Cherry Kearton, released in 1910. It is a documentary featuring Theodore Roosevelt in Africa. It is shot in silent black and white.

One of the biggest headline-grabbing stories of 1910 was former president Theodore Roosevelt's safari into Africa. Landing in Mombasa in 1909, Roosevelt spent months in the wilds of East Africa, hunting big game in parts of what are now Kenya and Uganda.

For some of this journey, he was accompanied by famed British bird-and-animal photographer Cherry Kearton, who shot wildlife and native scenes with a hand-cranked motion picture camera. Among the scenes captured by Kearton's camera were a number of Kikuyu and Maasai gatherings and dances – although the Maasai were incorrectly identified in the film's slates as "Zulus."