His lab was also decked out with "state of the art" technology of the 70s and 80s. So having a beta player really isn't all that unexpected. And if the guy can create a laser that powerful out of a CD player, I'm sure he wouldn't have much trouble fixing up a VCR that might be a bit worn with age.
That said, I'm really confused by the amber process. It clearly just creates a protective coating around things, else the de-ambering processes we've seen wouldn't work whatsoever. So... how does it perfectly preserve living flesh, let alone human beings? I mean, it would have to completely stop the brain and every system inside the body... even though it's just coating them externally.