Yeah, meds are not the solution to all problems. Some meds can at some times be useful for some people, but it is not appropriate to just blanket the population with benzodiazapines and consider the population to be mentally healthier. All sort of other stuff like improving social connection, reducing working hours, building skills, and so on can do a lot more to reduce anxiety and depression, but where is the funding for a local community garden or woodworking class?
I don’t know about videos but having a look at the OSI model is a good way to start. It covers the abstract framework for packetizing data including things like the distinction between hardware and software, envelope, encryption, application layer stuff, the whole shebang. The cool thing is by going hardware, network, application you can see where responsibility are and it helps you understand where things can go wrong.
If you are interested there are plenty of CCNA style courses available on the internet, licit and otherwise, and they go into more depth, and the same applies to RHCE/RHCSA material. The training for certifications like that covers what you want to know but also puts it in context, and again licit and otherwise sources are available.