I get the same effect. I think it makes sense, even though I understand your reasoning. Both the fovea and the rest of the eye perceive more detail when you're

I get the same effect. I think it makes sense, even though I understand your reasoning. Both the fovea and the rest of the eye perceive more detail when you're closer to an object (the fovea is no different in this respect). When you're close enough, the fovea can perceive a larger area in detail, which we see as motion in that animation.