Here a plug that utilizes the holes to make a secure connection that can only be removed by pulling on the collar to remove the pins that go through the holes.

Yeah it’s a thing and if you have the holes in the plug, they must meet NEMA spec since it actually is used for locking in lots of cases. Despite technology connections missing the patent and specs from their videos.

What sources did tech connections have other than their wrong and biased experiment on modern receptacles that wouldn’t have this feature?