The one thing I don't understand about the whole video is the "Lacquer" reference? This looks like standard old solvent basecoat/clearcoat urethane and they refer to the clear as a "lacquer", huh? Maybe it's a regional thing where clear is called "lacquer" or something.
Anyway, about this spray technique, the most important thing to understand about how he is spraying and pulling off no running stuff all over the floor is trigger technique. He is going off and on a LOT he is probably going partial on and not full on trigger on many of those in and out motions on that bumper. That along with a properly set up gun for his style and he pulls off a perfectly covered, paint film. Many who would try his method would end up with WAY too much material because they aren't triggering it properly and the gun could be set up with too much material transfer. He has it choked back a bit, that and the triggering keeps him from applying as much material as it looks like he is.