Well, not really sure what that video proves? For any of that testing to have results they would need to have the exact same equipment with the same specs and then look at the ware under a microscope to actually check any difference. Cycle time would have to be measured with high-speed tools as well.
This other guy with just plan jane AR took it to meltdown at 440 rounds. So lube or not the AR's can just do sustained fire.