Just being honest, watching someone rev an engine on a test stand has the value of a can of beans in a dollar store which is what's happening in all of these videos. Get this stuff on a dyno and in a car if you want this to go anywhere. Call me whatever you want, but the dynamics change radically when you apply load.
You are correct and I put this engine together just to abuse it, and the valves are floating but the dyno I use is almost 3 hours away. No one close to me can do vw. But me abusing this engine does tell me things I need to know. And when I build new engine I brake them in on this stand and get the carb and rockers set and do a couple oil changes ans when it goes into a vehicle I have very little to do before I drive it.