Two of those YouTube links are to Patrick Boyle who is a very respectable and knowledgeable ex hedge fund manager who dives DEEP into the topic while remaining entertaining. It’s a hilariously outdated take to say that YouTube content guarantees a lack of value or authority.
Patrick B is also a finance professor and most of his presentations (generally) maintain a level of academic rigour.
he got into the youtube during covid because he was posting YT vids for his students, and they just kept sharing them with everyone; he just ran with it
also: he talks deliberately slowly for subtitle and non-english speaker purposes; use the settings to speed him to x1.25 or x1.5 speed