In 2003, Harald Szeemann invited Rudolf Herz to an exhibition. Herz then challenged Szeemann to join him in the driver's cabin during the long transport of his monumental sculptures, and to express his thoughts on Lenin. These recordings were lost for a while, but now make for a amusingly clever posthumous portrait of Szeemann (who died in 2005).
Streaming availability for US region, via JustWatch.

Chadwick Boseman: A Tribute for a King
2020

Drew: The Man Behind the Poster
2013

Listen to Me Marlon
2015

John Candy: I Like Me
2025

I Am Heath Ledger
2017

Gilbert
2017

Naqoyqatsi
2002

Sidney
2022

Struggle: The Life and Lost Art of Szukalski
2018

As I Was Moving Ahead, Occasionally I Saw Brief Glimpses of Beauty
2000