Black Face is older then cameras. And as far as modern cameras go, with my limited experience in digital photo post processing, I'd say that the skin tone issue might have something to do with White Balancing. This is tricky in landscapes already, because not everybody carries normal grey cards with them (some people do apparently). And I know from people that shoot a lot more portraits that getting skin tones is always tricky.

Not saying it isn't related to cameras, so. But if it is, I'd suspect it to be much more of an issue with in-camera created JPEGs, RAW files don't do white balancing (at least all my Nikons don't). I have zero clue how dedicated video cameras work, so...