The conclusion is invalid. Going from perception of the way it is spinning to a solemn pronouncement on whether some one is a right brain or a left brain thinker is not warranted.
There is ONE brain. If one chooses to analyze it, there are two hemispheres, interconnected. In the normal brain they work together. In a very small number of people, the connection between the two has been severed, and the hemispheres do not communicate. That is not at all the normal situation.
The missing word is ‘dominant.’ One mode of thinking may dominate the other in an individual, but in normal people, both function.
“She’s” not spinning at all. It’s just a bunch of solid black frames cycling positions from left to right and back again.