I also haven't watched the whole thing :/ but I have worked in many areas of film/video production. I have always been amazed at how these machines and their operators performed this magic for decades but were overlooked by both their audience and industry. This studio and this machine are glorious wonders of 20th century media technology and art history but almost nobody realizes this. Very sad. :(

It is similar to the CGI industry's hard work being overlooked over the years, but maybe that is changing retrospectively as more people come to realize the feats they accomplished on antique hardware.