I know this guy from his videos over the years on hiking topics, like how to safely purify water with the minimum fuel and how to pack calorie efficient food.

His videos are incredibly well researched, very in-depth, and absolutely zero fluff. Very much feels like his cycle is to get intrigued by a topic, spend a year deep diving into everything that's published, extrapolate what he can from there, then summarize it in a 1 hr video.