You've seen the buddy cop movie a million times before, especially the mismatched buddy cop movie. Having the police officers come from different racial backgrounds is an especially tried-and-true element of this genre; it allows them to make fun of each other for the way they talk, the stuff they like, the activities that take up their free time. It's good for a reliable laugh, in theory.

You've also seen the found-footage movie a million times before, beginning with the precedent-setting "Blair Witch Project" in 1999 and again in recent years following the success of the low-budget 2007 horror film "Paranormal Activity." A character carries a camera around everywhere, documenting everything, or maybe a camera just happens to be rolling and it captures secret or strange goings-on we wouldn't be privy to otherwise. It's a conceit that reflects the narcissism of the iPhone generation. Why wouldn't we record everything we do? Everything we do matters.

All of this brings us to "End of Watch," which combines these two approaches: It's a racially mismatched buddy cop movie in which the cops record their daily activities while on patrol, from mercilessly teasing each other in the squad car between calls to tracking bad guys through the dangerous streets and narrow alleyways of South Central Los Angeles.