If you search "Watamote opening theme", you'll find the people that made the original. They made two other versions too, of only the guy singing, and only the girl singing. The one where the guy sings is funnier though.
Call of Duty Zombies (CODZ) is a fan-managed gaming community centered around the popular Call of Duty franchise with central focus on the Zombies mode. Created in 2009, CoDZ is the ultimate platform for discussing Zombies theories, strategies, and connecting players.