The way that the video screen is occasionally moved out of the way to make room for the exercises is a really fresh take on the genre. And I like how the presenter comes off as enthusiastic but not canned. Very nice!
I suppose it would cause some cognitive dissonance. One question I had while thinking about the (purely hypothetical) dissonance was : "Is he being overly enthusiastic, or is my low-key behaviour a subtle result of years and years of programming and debugging in an imperative model, where I literally have to internalize the computer, the Von Neumann architecture, and did I somehow end up being an unemotional VERSION of IT, a robot-human hybrid?!". A horrific thought, eh?! :-)
Von Neumann programming would make you overly excitable, what with all these state changes and side effects.
Pure functional programming leads to immutable calm.