Very smart way to teach people with educational videos and reward them with one BTC, and I think they are probably sharing parts of private keys that is split into ten videos, but it could also be just coded message and first step for generating private key.
Imagine if you are sane enough to give away one BTC, what more can you give the crypto community. He is very lucky whoever solves that puzzle. Anyway, those who have crypto and were able to earn so so much without investing would probably be able to give back to the community. If in case all you folks were able to get your millions in crypto then by all means you have to share your blessings with the cryptocurrency community.