The Efficient Engineer

The closest thing here to an engineering degree's core courses, made watchable. Each video starts with the basics and then digs into one topic properly: stress and strain, shear force and bending moment diagrams, viscosity, Bernoulli's equation, laminar and turbulent flow. The animations show what the math is describing, which is exactly where textbooks lose people. It suits engineering students before an exam and curious adults who want to know why a beam is shaped like an I. It asks more of you than anything else on this list except Ben Eater, so expect to pause and rewatch.