An American couple with their son visited Cambodia and the impressive temples of Angkor Wat in 1968. The father made an 8mm film recording of their holiday guided by Cambodian artist Nhek Dim, who from 1963 to 1967 lived in the United States to study cartoon filmmaking. That’s probably how the maker of this film knew him.
Notice that there are hardly any foreign visitors then, and how clean the streets of Phnom Penh are.
Also notice at 20:38 the Indian-style tuktuk in Phnom Penh. I didn’t know these were present in 1968. Nowadays, they’re everywhere and have replaced the Cambodian-style tuktuks.