Pretty good swing for 11, imo.
She is dragging the bat, though. That is, her right elbow gets ahead of the knob of the bat during the swing, which can be seen at 0:06.
She's moving too fast for me to verify, but it seems that she is beginning her swing a split second too soon. She's starting her swing before the front foot comes down. Some people call that leaking the load. Hands should remain loaded just a fraction longer.
Then she is reaching for the ball, extending her arms too early. Might be a reaction to the pitch (ie, changeup, or just mistimed it), or her typical swing. She was out in front. Would have to see her tee swing and compare.