I watched this last night and chuckled each time he claimed he could still see the drone. "Taking it up to 300 ft to keep VLOS" - lol.
Now I did go rogue with mine. I started in a grove of large cottonwood trees and flew out 4900 ft following a local river, BVLOS once I cleared the top of the trees. Very rural area and I launched from the end of a dead end road - but at that distance I got skeered and turned around. I was very impressed though that I never lost a bar despite the trees surrounding me and the controller. Forgive me FAA.