Wow, good job Kurzgesagt!
Only one obvious factual issue:
Casein and whey contribute to "structure" e.g. the texture and mouth feel (
https://en.wikipedia.org/wiki/Mouthfeel ) of cheese, stretchy melty etc. They don't really contribute to the taste/smell of cheese, those are the products of fermentation like lactic acid and various volatile aromatic molecules. Plant cheeses can taste like cheese if enough of those flavors are added, but they don't melt or stretch well, and they don't feel like cheese (they have a more starchy thing going on, particularly if the main ingredient).
I'm very impressed with how well researched that was.
One thing they could have mentioned: A likely reason that dairy doesn't correlate to health problems in populations despite its constituents is because it appears to be better than meat, and as a source of fat and protein heavy dairy consumers are likely to substitute some meat in their diets rather than eat it in addition to the meat. People fill up, and a large part of the benefit any given food provides may be what it keeps you from eating more of rather than what it does or doesn't do nutritionally.