His quad copter is a home built quad that may be large enough for quadcopter fishing for smaller sun fish over lakes. I hope he makes a quadcopter FPV video of them fishing with his DJI F450 Quad RC aircraft.
Some people also call these aircraft multi-rotor, multirotor or quadrotor helicopters. All I know is they are pretty cool and I am not good enough at flying yet to get one of these big bad boys! Especially not with FPV flying with either an FPV tricopter or FPV quadcopter.