They don't appear identical to me either. If you flick through from first to last (chronologically, eg from image 2 onwards), watch the star in the very bottom-left (they all behave, but this proximity to the edge makes it more perceptible). It does exactly what it should do.

What does seem interesting (to me), is that if you do the same and watch the opposite (right) edge, you'll the stars on the left edge are travelling right (and upwards), and the stars on the right are travelling left (and upwards).

I find this novel because I've never seen this myself - I'm in Northern Europe, so what I see is stars spinning around the pole. The effect we see here is the camera pointing towards the equator, putting it facing east(ish).

Regardless, this is one area where I'm happy to defer to natgeo's ability to spot shenanigans.