Long overdue - megalith + code databases

The guy has a channel that I subscribe to, separate from this combo effort in the linked video. Matthew's young, professional and enthusiastic and I like the topics he covers.. all good stuff. One thing I don't like is that he tends to waffle and divert a bit when he's in conversation with others, but he has done a good thing here creating two sets of databases. The first one is consolidating information about megalithic sites around the world, and the second is consolidating codes that get repeated at disparate sites around the world - both of which might indicate possibly a common global culture in the distant past before this thing we call civilization starting only a few thousand years ago. One such 'code' I can imagine, though I haven't checked the database yet, is the Swastika. Not the Nazi version but the one that has been a symbol of peace for millennia amongst a variety of cultures and has been identified as having been drawn and had significant meaning something like 17,000 years in the past. I'm also aware that there was something like a common alphabet of symbols being used in cave art across a large area of pre-historic Europe, saw the story not that long ago. https://www.youtube.com/watch?v=akf0ZjX68o8 https://thestageoftime.com/lcd-i https://thestageoftime.com/acd-i