Acting in a musical comes with its own set of challenges and obstacles. It has a specific technique and training that is unique to the medium, as does acting in front of the camera.
Musical theaters artist tend to forget that acting in front of the camera does not need the large gestures and actions that you need to communicate intention as when you act in a musical. You don’t need to push with your body or large hand gestures, and you certainly don’t need heavy breathing and big rolling eye gestures. When you make these large gestures in front of the camera, you are overacting.