She is changing the directions!
Thats obvious (...to me...) , - just follow what leg she is standing on...
She always moves towards her outer part, of the leg "in the air".
Left foot off the floor, she is turning anti-clockwise.
Right foot off the floor, she is turning clockwise, and it switches randomly.
What is funny is, that some cant see her switching, and automaticly put her in the dancing position they first saw her, no matter how many times she changes direction.