Ultralight? A paramotor is just a backpack motor and a parachute. Is it even in the same category as an ultralight? He does not have a radio on him but he does it somehow. I believe he has some kind of flying license however.
A paramotor is an ultralight in Europe and requires license, I completed the flying school for that category (fast-tracked as I already have a license for airplanes), but I never moved to take the exam, still I am aware of the regulations.
In US there is no license required, but that also restricts where you can fly. If you get some licenses it does expand where you can fly, but I am not knowledgeabe on the details there.