After googling Ephraim, I see that he is a seasoned, Broadway performer. So that means that really was his own singing voice used in the film. I know it was his own, terrific dancing. I sent him a Facebook message, telling him how much I enjoyed his performance. I've received no response, but, you know what? I didn't send it for a response. I sent it simply to tell him the good feeling I got from watching him. God bless him. I look forward to seeing whatever he does next.
EPHRAIM (Solo Dance)