Luke from Outdoorboys, being able to go into the Alaskan wilderness with almost zero supplies and not only survive but thrive. He largely retired his YT channel for a variety of reasons but I found what he does, how he does it, and how he teaches his kids to be awe inspiring.
As an aside, I also want to say that I find most YTers to be a bit of a flash in the pan. The ones I watch seem to start off as a part time YTers, they get some success, and then get the itch to be an influencer and go full time. Shortly after that they struggle make enough YTs to make money, so they do crazier or different things and the magic of the channel is lost.
I enjoyed another winter camping YTer, who bought himself a cabin, and spent a couple of years rebuilding it and filming that - not an issue, but he quit his job and became a full time YTer. With his cabin fairly well refurbished he bought another one to refurbish because he couldn't he had to keep pushing the envelope since he now relying on the income - I've unsubscribed because the magic was gone
