A person who prefers to view a live musical performance through the screen of his or her camera/phone, thus blocking the view of the concertgoers behind the camera.
"Dude, how was the Metallicaconcert last night?"
"They sounded great, but those fourth-row tickets I paid all that money for were pointless. I couldn't see Kirk Hamett's fingering because the cameragoer in front of me was filming the whole damn show on his iPhone!"
"Well, maybe you could at least check out what he filmed on YouTube."
"Naw. I checked. It wasn't even there. It's like he was just filming the whole time to validate his experience at the show."