Thanks for the input!
In my opinion the best guy to watch and learn things abou crypto is Andreas Antonopoulos.
I don't know if he is identified as a Youtuber, but he has a great content and interesting opinions about the crypto space.
I second this. Anyone in the space who talks about how crypto works: whether its the blockchain, DAG, RSA, whatever are worth watching. Those talking about the future price of BTC ... meh. Avoid them.
He doesn't talk only about that.
He has knowledge about the whole industry, and he discusses models that are used in many projects.
Indeed, he is a Bitcoin expert but his content moves all around the industry.