The video on L'Hopital's rule, and the one on Fourier transform, helped me intuitively understand those topics for the very first time ever. And I'm years out

The video on L'Hopital's rule, and the one on Fourier transform, helped me intuitively understand those topics for the very first time ever. And I'm years out of school and have no need to use those concepts in work again, yet I watched them just to understand what was always a mystery to me in class at the time.