Wouldn't the original owner be Michael Parbot since it was his documentary? And he's passed away, so in that respect wouldn't the new owner be the Parbot's estate?
Who cares who you got the tape from, the real issue is who owns the copyright and it sounds like Parbot's estate.
But from Neo's original posting in 2007, it came from Gary Kurtz or someone Gary knew if I'm not mistaken.