The 3B1B videos on 1) the Fourier transform, and 2) the determinant were eye-opening for me to understand what all the math actually meant physically, 20 years

The 3B1B videos on 1) the Fourier transform, and 2) the determinant were eye-opening for me to understand what all the math actually meant physically, 20 years after learning about that stuff in a book. Sometimes it really does take explaining it from a different angle.