By Travis Reed FORT LAUDERDALE Fla. (Reuters) – The Federal Aviation Administration is investigating several videos filmed using drones that flew into and around firework displays, including two apparently shot on the Fourth of July and one from Florida that has received nearly nine million YouTube views. The agency this week confirmed at least three investigations into camera-equipped drones believed to have taken footage in Nashville, Tennessee, Greenville, South Carolina and West Palm Beach, Florida. The video that went viral features eight minutes of dramatic fireworks close-ups, with projectiles almost hitting the camera.