https://www.youtube.com/watch?v=xWb97DEq864&list=PLTjLwQcqQzNKzSAxJxKpmOtAriFS5wWy4
00:00 Motivation: Real mean values
01:16 What are Hermitian operators?
02:16 What is a self-adjoint operator?
02:56 Notation of a Hermitian operator
03:20 Eigenvalues are real
04:27 Eigenvectors are orthogonal
05:56 Eigenvectors form a basis
06:37 What is a Hermite matrix?
07:19 Examples for (non) Hermitian matrices
More: https://en.fufaev.org/hermitian-operators