It's like a steam boat. Or old-timey water wheel.
That's a big wing airfoil, and it's cheap foam, and it's not as mechanically complex as a helicopter. There is potential here for low-speed heavy lift. I wish they'd included a scale-up of batteries from "Tiny" to "Too heavy to loft", with sustained in place hover times and watts per kilogram as the performance metric.
Flying wing from pizza box: https://m.youtube.com/watch?v=hTYuj7hzKeI
One of the first flight controllers he coded was in Arduino..
https://github.com/nickrehm/dRehmFlight/tree/master/Versions...
He deliberately kept the code in single file and made sure it was still easy to follow.
Ironically, he says at some point in one of his videos 'I'm not a software guy' and next gives a masterclass about how it is done.