From 2016, here’s a great video by Ryan Hollinger analyzing how documentary filmmaker asks questions, builds rapport, uncovers information. This video doesn’t get into one of my personal favorites of Louis’s superpowers – that he ignores negative energy – discomfort, anger, superiority – from his interviewees. Rather than fleeing, he stays calm and continues to engage.

(update: video link corrected)
https://www.youtube.com/watch?v=i1uHmRrEvXA