I think this video is great, especially with respect to showing details of the hopper. From my job with a large studio chain outfit I've had the incredible opportunity to have had personal tours of several coating operations. But never close-up views in the light like this. We had corporate secrecy agreements with all the manufacturers we worked with so these are things I haven't spoken about. But with these public reveals I guess a certain amount of the confidentiality veil is lifted.
Probably the best tour, along with my boss and a former boss, included time inside the Control Room for a pro neg film (prior to Portra, so 20+ years ago). When we were introduced the department manager informed us that they had been waiting for us to arrive; they were getting ready to coat some of our film (full emulsion runs were allocated to us). I asked one of the Kodak execs escorting us, will they be able to answer any questions for us? He thought for about a half-minute, then turned to the Control room staff and said, "Tell these guys anything they want to know." (Anyone who knows me well would be saying, "Oh, oh!")
Now, we saw the confidentiality as almost a sacred thing, which is one reason why people trusted us to this degree. Today, roughly 10 years after my former employer went "belly up," I still don't want to publicly reveal things that are otherwise unpublished. So it's kinda cool to see things being publicly revealed.
Fwiw I love watching Destin's other videos too. He also has another one in this series related to QC tests of the coated film. Probably worth seeing. (As a photo guy I'm a little amused by Destin's seeming inability to understand the effect of looking at colored objects through colored filters. Someone shoulda explained what cyan, magenta, and yellow really are, spectrally; he's a smart guy.)