Yeah, he has a slight misconception of what 2 phase power is / was. Not uncommon by the way, when I went to school I think they spent all of about 30 minutes discussing it as an interesting historical footnote when talking about Tesla. In fact, I learned so little about Tesla in school that I was shocked (pun intended) years later to learn how important he was to our entire industry.
As I waited (forever it seemed) for that video to load, I looked at his name and jumped to a conclusion that this was going to be a European thing. When I worked for Siemens years ago, I got very confused as to why they were constantly talking about 2 phase applications, which I knew by then were exceedingly rare. Yet almost all of Siemens' products had instructions on using them in 2 phase systems. I eventually figured out that what WE call "single phase", meaning 2-out-of-three phases, the Europeans call "two phase". It's just a semantics thing for them. Turned out not to be the case in that video, he is just unclear on the way it really works himself. I'd be willing to be that he is unaware that 2 phase systems really exist!
