The second video is probably the best example. Too much friction generated from 627hp and whatever the torque is, being spun at 6800 rpm. Since the driver only had a partially engaged clutch, the pressure plate couldn’t clamp the clutch and flywheel fully to the input shaft. Since the torque and hp being generated from the crankshaft weren’t being transferred fully to the input shaft and wheels, the clutch was slipping and generating excessive heat. The heat and friction weakenend the metal from the pressure plate while the 68000rpms of torque shot the pressure plate like a gun.
Something along those lines. Engineers of son want to do a better explanation?