what was that

A man with long, wavy brown hair, wearing a white long-sleeved shirt, sings into a green microphone on a stage with a large screen and a speaker stack in the background. He holds the microphone with both hands, sings with his eyes closed, and then opens his mouth wide as a person's arm enters the frame from the left, pointing at him. The scene cuts to a different man with short brown hair and tattoos on his arm, who is also singing into a microphone.