In this example, Zoée asks FINE YOU? But it is also okay to sign YOU FINE YOU? And even just a FINE? would be more than acceptable if you are making eye contact and slightly leaning towards the person you are asking as in this situation the “YOU” would be incorporated in the act of learning towards the person & making eye contact. In addition – remember that ASL is all about concepts so this sentence could be interpreted as: “are you alright? are you okay? everything fine?” etc.
Remember, this is a yes/no question which means you should raise your eyebrows for the entire question.