You don't need any production values - just a recording of a great lecture. For me, it was easier to grasp basic linear algebra concepts from G. Strang's video

You don't need any production values - just a recording of a great lecture. For me, it was easier to grasp basic linear algebra concepts from G. Strang's video lectures than from his textbooks. That is because, in a lecture, you get the text content plus intonation/pauses/stresses/all other nonverbal stuff, plus drawing on blackboard [1], plus physically pointing to various elements of equations etc. In text, all that nonverbal stuff needs to be expressed in a text format (plus illustrations), which is a narrower channel and thus often the content gets technical, awkward and hard to parse. Studying math is perhaps the best example of this - if you have some basic math literacy, someone can convey a new math concept to you in a short conversation, while parsing out the intuition of the same concept from the textbook could possibly take you a couple of hours. [1] In the textbook, you only get the final illustrations, while in lecture you can see him drawing them, and the specific way he does it conveys information in itself.