[the frame rate of the camera and the rotation of wagon wheels made it appear that the wagon spokes were rotating backwards, when in fact the were not.]
It’s an interesting effect. I was in Branson several years ago and was watching a ferris (!) wheel at night - of course it was rotating.
I could concentrate on it and at various points it would appear to rotate the opposite direction. It was at an angle which I believe (?) makes it easier for this effect to happen. Of course it didn’t rotate the opposite direction but the visual made it appear to (sometimes).
Was it the WHEEL that appeared to be moving backwards or the LED lights on the structure that did it - like the ‘moving’ lights in a theater marquee.