I can't help but wonder if 'this is a setup' (!). She takes her time to do each exercise movement but she's sandwiched between 2 others who are in a bit of a hurry and their juxtaposition kind of emphasizes that she is dancing to music vs. doing calisthenics (no offense meant to the others !).
The documentary that this clip came from looks like it might be interesting. It's in my queue :-)