It really doesn't make sense that Matysik would own the Chase rights in the first place, like it would with his Greater St. Louis group. Maybe KPLR owned the rights and sold them to him? That would make sense, as the Chase public access show and then DVDs came about from KPLR showing a Chase clip on their newscast, getting massive amounts of positive feedback, and then running a documentary using Matysik's tapes (the master '60s tape he got from Joe Garigiola and his '70s-'80s off-airm recordings).
As far as Crockett, remember that they didn't get the rights/libraries for the old footage when they bought UWF, CWF, and maybe even Central States.