Here is a documentary based on the footage gathered by Austrian anthropologist Christoph von Fürer-Haimendorf on the hill tribes of the Deccan in the 1940s (archive). This includes the tribes of the Chenchus, the Reddis, the Koyas, the Bondos, the Gadabas, and more. It may well be the only visual record of these groups from that period—their rituals, hunts, dances, foods, marriage ceremonies, material life, and more. It is revealing too of anthropology from another era, with notions and judgments that seem positively quaint and superficial by today's standards. Note, for instance, the force and frequency of words like "primitive" and "civilized", and the need to delineate borders between them. I don't know much more about Fürer-Haimendorf beyond what is on wikipedia, but this is nevertheless a valuable historical record. The film was made in the 1960s and narrated by a 30-something rising star at the BBC named David Attenborough.