Most of what is presented in videos above is are based on the works of Serbian historian and writer Jovan I. Deretić

Wikipedina on Jovan I. Deretić

Wikipedia says, and I quote ” Deretić was an engineer by training but was mainly noted for his pseudohistorical and conspiracy theories” and also “Known for Controversial pseudohistory and alternate history”.

When Wikipedia says something than it must be true… Shocked  Rolling Eyes

Yes, it is true that he had an university …