Second-hand Gamer

When someone says they are a gamer, but they do not actually experience playing the game themselves. They only watch other people's walkthroughs/play throughs/let's plays/etc. to gain knowledge of the game.

Person 1: Yo! Did you hear that Matt is a gamer?!
Person 2: Nah, bro. He's never actually played the game. He only watches people play. Like a Second-hand Gamer or something.