I've been all over this stuff for a while, it's a huge rabbit hole. I'm glad more are taking interest..
some worthy stuff to check:
very weird relations on ancient sites all over the world:
https://grahamhancock.com/alisonj1/
the BAM series starts with old sites then focuses on the Barabar Caves in India which are IMO the most incredible structures found to date:
BAM 1
https://www.youtube.com/watch?v=1QX5cHUsNSY
BAM 2
https://www.youtube.com/watch?v=HmJerr3-PTE
this guy interviews most of the people on the space if you want this format: