To what extent does the video challenge racial hierarchy by subverting expectations?

In Beyonce's video, she challenges racial hierarchy by subverting expectations. She shows this in various aspects of her music video. One example would be where Beyonce and her dancers are in an empty swimming pool. This is believed to be a reference to the Jim Crow era when black people weren't allowed in the same public swimming pools as whites. So Beyonce and her black dancers being in the swimming pool could be stating that they are now allowed to be in the swimming pool as they are on an equal level to whites.