Kapadia's documentary technique is to avoid the lazy trap of using a lot of talking heads, and instead to dig deep into the available archival material.
[About directing his film "The Warrior" in a desert in Rajasthan] "The
crew suffered the odd illness along the way; dehydration, sunstroke,
heat-stroke, malaria, dysentery, scorpion stings, being bitten by rabid
dogs, the usual kind of thing."