Brazilian tape libraries

I know video tape was scant in Brazil in the 70s and 80s but does anyone know who has the physical footage and rights to some of the older tape libraries of the older Vale Tudo events? Does the Gracie family (Rorion) have the ownership rights and footage of all the Gracie Desalfio events, and the events in which family members fought in? Who would have footage of the event with Sergio Batarelli vs Rei Zulu? I guess Sergio right? Does Sayama or ISC have the early SHOOTO footage from 88-95?

I think Paqueta has the most extensive library in Brazil. Not sure about vale tudo, but BJJ for sure.