Frankly GoPro's are good cameras, but they have the same issues Phantom does, but the Phantom has more control at this time than Solo, over camera settings, etc. A little critique, DroneNerd's video has great color, however the shutter speed is too quick, making pans look jittery. To smooth that out the shutter speed needs to slow down to provide a smoother look between frames as they display. To do that an ND16 or ND32 neutral density filter when in bright sunlight helps minimize the problem. Drone Nerd did a great job of panning slow to minimize the jittery frames, but adding an ND filter would make it look awesomely smooth. Slow pans are an essential skill to learn, DroneNerd has honed this very well, it takes patience and a careful touch.
DroneNerd, FYI, the max altitude is 400ft
above ground level. When you climb a mountain, you can go 400' above the mountain. I just wanted to clarify that since you implied 400' was your max height limit in your video. I was at Breckridge recently and climbed 1600' high, legally, because I was always about 150-200 above ground level, basically staying about 100' above the trees.
Here's a comparable video using a Phantom 3 that a friend took recently. When viewed in 1080 it's clear like DroneNerd's GoPro, but slightly smoother when panning around. This was using ND8, but should have been N16, possibly ND32, so he says.