This footage was taken by F550 with Naza V2, H3-3D Gimbal, GOPRO3+ and camera positioning kit so that there is no arms and legs in the screen. If this video was taken by a Phantom, you may see propellers, arms or landing skid in the screen.
It is a good idea to build your own drone. It takes time but you will learn a lot in the process.
The hexacopter in the above video is a Tarot T960. A large hexacopter or octocopter is an ideal flying platform that can do anything you want.
The above video was taken by Phantom 2 + H3-3D + GOPRO3+ + iosdmini + Storm all-in-one FPV solution (Premium). The transmission distance is around 1-2km. The above circuit diagram for Phantom 2 is for your reference. If you don't want to spend time to install it yourself, HeliPal can install the FPV system for you. Click Here for more information.