They are in the first link I supplied about the pyramids. Tomorrow I'll try to link a few timecodes of the pics. Once you see what I'm talking about you'll start seeing them all over the world locations.
2:47:27, 2:47:32, 2:47:47, 2:47:49, Peru- 2:48:15. An example of Eygptian thinking with that shape... 2:48:52 Barabar caves. Doorway. 3:11:45- watch for 20-30 seconds til finished.
It's not just this persons video, I've been seeing this for years in all sorts of seminars and vids. far more places than this guy touches on. The shape may be a practical one as it may be stronger than just a rectangle opening in some way. An a frame I believe is a stronger support shape than a square.
Incredible stone work. 2:52:51 2:56:05 Easter island 3:00:53 And why are almost all the statues facing inland? With their backs to the sea? A ship drawing on a Moai. 3:02:01