As I basically said in another thread, I'm of the mind that this is just another collector, though certainly one with slightly better-than-average access to material, possibly because he's managed to get a professional or two to take his "museum" seriously. In other words, on the professionalism scale, I think this is someone a lot closer to Jamie Locklin than Edd Kalehoff.
I would wonder why an real insider would have any interest in posting a site like this, especially without identifying himself. A pro would probably be doing a little better job about assigning copyright too, and not be so quick to play the "public domain" card like so many collectors do. Also, given the wealth of game show musical history out there, this is an oddly eclectic and spotty collection. Not that there aren't some wonderful pieces, clips that obviously came from professional sources, but a 'museum' run by any kind of insider would be larger and wouldn't be made up primarily of stuff that collectors find rare. An insider wouldn't know or care what we have. This guy's just trying to show off. And to be fair, doing a pretty good job of it.