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Re:Why Do U.S. Electrical Plugs Have Holes in the Blades? by SamPatt on Saturday October 09, 2021 @11:23PM (#28815476)
The video contains a video showing exactly how the holes are used in manufacturing.

You seem to dislike people who create content on YouTube but this video seems well sourced.

Re:Why Do U.S. Electrical Plugs Have Holes in the Blades? by Thetawaves on Monday October 11, 2021 @12:21PM (#28829993)
You are missing the point - people can make content on youtube all they want, but that doesn't make it correct.