I have done hundreds of these blocks. Nice demonstration. You can approach the median nerve from either the ulna or radial side. I usually approach from the ulna side as the radial artery can be in the way otherwise.
Well done great review that will make me faster at these blocks & education is rare on it! It would help if you either say or label always if the image or picture is of the L or R hand or forearm as your diagrams switch back & forth from 1 to the other which causes some confusion.