Symbiopsychotaxiplasm Take One is a groundbreaking and fascinating documentary (or is it?) by the legendary William Greaves. Loosely, it’s about the nature of reality, the intended observer, and how film-making creates thorny issues between the two. I can’t say I’ve seen anything else like it. Supposedly Charlie Kaufman refers to Symbiopsychotaxiplasm Take One repeatedly in his novel Antkind, which welcomes the comparison: yes, one could say this is something like if Kaufman made a documentary.
Here’s a short video essay on Symbiopsychotaxiplasm Take One that might answer some of your questions:
https://memora8ilia.com/index.php/2022/06/09/symbiopsychotaxiplasm-take-one-is-a-groundbreaking/