On a recent warm evening in August, I settled into the lush gardens of the Agung Rai Museum of Art in Ubud, in Bali’s hill country, for screenings of two remarkable films: “Island of Demons” from 1933 and “Headhunters of Borneo” from 1936. Directed by Friedrich Dalsheim with Victor Baron von Plessen and, for the first, Walter Spies, these works capture Bali and Borneo under Dutch colonial rule, a decade before Indonesia’s independence in 1945.