I stumbled across this post by PetaPixel in my news feed on Facebook and though it may be worth sharing.
I haven't had any time to watch any but hope they are helpful

Here is the original post by PetaPixel

https://petapixel.com/2017/03/24/you...aphy-lectures/

Here is the link directly to the Youtube Channel

https://www.youtube.com/user/SVANewYorkCity/featured


Enjoy