Her right foot is resting against the ground, which helps.
Concerning her hands, well observed.
1) part of ballet training is to control the hands so they look relaxed while all muscles elsewhere are working ; for instance, they would never exhibit a fist or a stretched finger, by the way reducing the "vocabulary" quite a lot. Clearly, she's not in ballet mode here, being completely absorbed by the critical review of the videos. Good opportunity for candids given her general camera- or audience-awareness (that comes from her profession).
2) in the present case, I picked the shot from a longer series precisely because of the "expressive" left hand.