That's a quick 4 image camera, not a 3D camera.

Well you get 4 images spaced out, therefor you could get semi 3D effect.

You'd need a lot more space between them for that to be effective and it would not work for anything that moves because the images are also spread out in time.

That's why old school stereo cameras had their lenses much further apart and that's why they fired synchronously.

OK. I was being 100% "This is exactly what I was thinking". I could have posted this instead: https://en.wikipedia.org/wiki/Nimslo

Of course, in my mind, I was thinking of cheap webcams strapped to wood.

Makes me wonder if it would be possible to make a 3D video camera by quickly sliding a regular camera back-and-forth in sync with the framerate.

Would have to be a high FPS camera. Some cheap linear rails and a NEMA 17 motor. Of course you would have to get the "sync pulse" out of the camera, then you would probably have to do a delay move to move into position before the next snap.

Sliding it back-and-forth would create too large accelerating/braking forces. Easier approach would be to put camera on a rim of continuously rotating wheel and take shots when it reaches positions of 90° and 270°.

* wasn't