My problem is that there is an implication that, viewing with one eye should somehow prevent you from or detract from getting 3D information of a scene. It is a serious over simplification of the process. That video demonstrates to me that binocular vision is not necessarily a help in 'seeing' a 3D scene. The title of the thread implies that this is a big surprise but why should it be?I don't know what the precise definition of "3D vision" is, assuming there is an agreement about that. But in this context, where the authors of the paper I was citing actually use the phrase "seeing in 3-D", I thought it was clear enough what I meant.
I love to nitpick too. But I recognize it as a vice.
In that video (which is on a screen, say 60cm away from you) your binocular vision is telling you that the objects you are seeing are in a single plane (which they are, actually). When you look with one eye, you lose that information about the distance from the screen (your head is stationary so no parallax help) and start to use the other, in this case very strong, clues about the scene. If you were actually viewing that scene directly in place of the camera, you would be getting lots of information about depth from the non stereoscopic information. Stereoscopic vision could be telling you that there is some depth to the scene ( that not everything is just 60cm away, as on a TV screen) but it's all the other clues that go together to form the internal model of the scene. Can you really argue that this paragraph is a 'nitpick'?
EDIT: PS @DaveC426913 if you read what I wrote and look at the video again, you could, perhaps convince yourself about the effect. It might be that one of your eyes is very dominant and that you do not get strong stereo information. My Daughter in Law grew up with strabismus and, even though it has been largely corrected, never learned to use stereo vision effectively (so she tells me). She can choose to look at an object with one eye or the other, at will but can't actually get the 'natural' stereo effect that most people do. Perhaps if you look at the edge of the screen. the plane of the picture may get into your brain better and you might see a 'flatter' scene' I see the effect very clearly and it confirms my idea about the reason for it.