I liked the MIT lecture on eigenvectors: https://ocw.mit.edu/courses/mathematics/18-06sc-linear-algebra-fall-2011/least-squares-determinants-and-eigenvalues/eig

I liked the MIT lecture on eigenvectors: https://ocw.mit.edu/courses/mathematics/18-06sc-linear-algebra-fall-2011/least-squares-determinants-and-eigenvalues/eigenvalues-and-eigenvectors/ https://ocw.mit.edu/courses/mathematics/18-06sc-linear-algeb...