For me it's the visual component, especially the animated transitions that very neatly highlight the relation between various concepts or values. I learned mos

For me it's the visual component, especially the animated transitions that very neatly highlight the relation between various concepts or values. I learned most of the topics in those videos well enough to pass highschool/university exams, but very often the real "aha!" moment came after seeing lines transform from one into another, planes deforming, or boxes being subdivided in 3blue1brown video.