I have taken many lectures, but in my experience, this is the best lecture on deep learning mathematics. If you want to solidify your basics, you should definitely take this lecture.
I highly recommend this to those who want to learn deep learning and approach deep learning mathematically. Most of the existing lectures on deep learning are about simple module usage and programming code usage, but I think this type of study has its limitations. I think this is a lecture that can develop solid skills for studying artificial intelligence by directly understanding and implementing a simple ann model mathematically.