This trailer is from Act of Valor, an upcoming film about Navy SEAL operations starring actual SEALs and demonstrating real military tactics. The trailer concludes with mentioning the opportunity to play Battlefield 3 on a movie theater screen as part of a promotion for a prerelease screening of the film. This page has details on the event, which will be "awarded" to the U.S. city with the most respondents willing to "demand" the privilege.