Maybe you should note that his OVERNIGHT test only had the 18 power pins taped off.Well, obviously you can't even watch a video with all your "expertise". The Z270 vs Z370 is 18 more VCC and 14 more ground pins. He taped off 69 VCC pins to prove that it could handle double the amperage, which it did.
So maybe you should STFU?
And he didn't prove that the pins could "handle double the amperage" under the conditions that matter: in a hot case under a real workload for an extended period of time.
Demonstrating you can run a pin above it's spec'd current capacity for a limited time in an open environment at room temp proves nothing.
Did he even bother to measure the temperature of the PCB with a FLIR camera while running that way, to check for hot spots?
'Cause you know, that kind of thing matters to real product engineers-- but not to people who merely play one on YouTube.