From the video description

PACIFIC OCEAN (Nov. 13, 2014) F-35C Lightning II carrier variant Joint Strike Fighters conduct night flight deck operations aboard the aircraft carrier USS Nimitz (CVN 68) off the coast of San Diego. These milestones are part of initial at-sea Developmental Testing I (DT-I) for the F-35C, which commenced Nov. 3 and is expected to last two weeks.