I watched the video and across the room is my 14" Kodak Commercial Ektar in shutter sleeping in the original wooden box which is shinny black with the Kodak emblem on it. It's like the saying. "how young we were" in the context of technology. So why use those lenses today? See the video and how much craftsmanship went into each and every one. How far apart is that Ektar from my iPhone that I watched it with?
Everytime I find a film or paper that I like, they discontinue it. - Paul Strand - Aperture monograph on Strand
Basically lenses are made the some way today, except of a bit more robotics, and those precision moulded lenses from plastic or glass-plastic hybrides. The most changes seem to be in the barrel-making. And most important, advanced computing technology.
I rather see this film as a a very good educational film than as documentary of industry history.