Necessity is the mother of all invention.
Doesn’t look much different than most setups on local farms used to pull semi trailers around by tractor to me. The guy was probably transferring the trailer from one field to the other and some hotshot HP pulled him over. Maybe his tractor was broke down or something.
Doesn’t say if the trailer is loaded, speed, anything.
Honestly I’d share space with that guy on any road vs most driving travel trailers and 5th wheel campers for the first time.
Nothing spectacular about it. I wouldn’t even think twice about hooking my F350 up and moving it either.
My 40’ camper is just as heavy as that trailer is unloaded.