Of course, the real explanation here is that this is a stroboscopic effect, aka the wagon wheel effect — the rotor speed and the film speed are matched (to some ratio) so there is no apparent movement of the blades for each frame of the camera.
Try it yourself and alias your monitor’s refresh frequency
Stepping Feet Illusion and radial version
Many other illusions at the site, including some favorites such as
Pinna-Brelstaff Illusion though I never actually call it that
Roget’s ‘Palisade’ Illusion I’ve seen a similar effect while walking past a door and seeing a crt monitor through the narrow gap between the door and jamb.
Motion Binding has a subtle demonstration about orthogonal dimensions really being independent
Here’s the index in case you want to pick and choose, rather than march through all of them