Pat verified for me that Accu-Stats did not tape any of the PBT events. That was done by Prime Sports.Mackey and the PBT likely doesn't "own" any of the PBT matches in a literal sense. It's a near-certainty that Mackey had someone assiduously videotape every PBT match that was broadcasted nationwide.
The broadcasted matches routinely had five commercial breaks -- for region-specific sponsors, as well as billiards-related products of national interest -- per broadcast hour, spaced 12 minutes apart, which usual resulted in missing games in any given hour of action due to network time constraints in a given time slot allotted to billiards.
As to ownership of the raw uncompressed footage (with no missing games), which generally far exceeded an hour, that's what you'll be learning about in your research.
Arnaldo
Mike