P.K. Mt. Fuji
kiwifarms.net
I don't know why he skimmed so much when talking about Eadweard Muybridge (not even mentioning him by name), even though his studies of a horse galloping technically qualify as a 'motion picture' his work is EXTREMELY vital when discussing the origins of animation which all use similar techniques and is even used to teach the 12 basic principles of animation.