> it seems self-evident to me that books and videos are complementary
Can't speak for others but for me it is more about efficient utilization of time rather than complementing multiple learning methods.
I've found that time spent in learning math from videos have poor return of investment. That time is better spent re-reading a chapter or that thing that I couldn't fully understand the first time and doing more exercises.
> Have you looked at for instance Khan Academy's Grant Sanderson (aka 3Blue1Brown) Math videos?
I have. I went through Khan Academy, Brilliant and 3Blue1Brown. After spending more than 100s of hours I started getting the feeling that these are all good for elementary level math.
But for any serious math (think real analysis, complex analysis, group theory and beyond), all these platforms did was leave me with a warm fuzzy feeling of having learned something cool but in reality that warm fuzzy feeling was not good enough for solving actual exercises that come in textbooks or really deeply understand the material.
I've given up on these online learning media. Back to textbooks. The difference is like night and day.
Can't speak for others but for me it is more about efficient utilization of time rather than complementing multiple learning methods.
I've found that time spent in learning math from videos have poor return of investment. That time is better spent re-reading a chapter or that thing that I couldn't fully understand the first time and doing more exercises.