No, he is definitely flying FPV and flies the TBS Disco.
I searched a bit and read some speculation that he used a 2nd copter following above as a relay station. It'd start to add a lot of componentry, but it should be possible to add a telemetry radio and small cell phone (or other small system) onto the FPV copter, and have it report position data to a second copter in follow me mode - wherever the FPV one goes, the larger one follows from a few hundred feet above, relaying video and possibly control signals. I would assume the guy also followed from a car or other vehicle to stay relatively close to the copter(s).
It would be a lot of work to go through just to make some youtube videos, but then again, some people seem to have inordinate amounts of free time and resources to do just that.