My 6 year old really likes Bedtime History. We're still in the first year of episodes. So far it doesn't have the greatest production value and he puts some common misconceptions in here and there but it sounds like the guy is trying and genuinely interested. He does a pretty good job at the ELI5 thing which to me is the most important part.

I've been there several times. When it's running clear, the sediment has all settled out, and you find some deeper pools, it really is that color. No camera tricks or photoshop needed. If there's any rainfall anywhere upstream it just looks like chocolate milk.