"Most of the kinescopes of the show were discarded by NBC, and so few copies of the show survive." http://en.wikipedia.org/wiki/Your_Show_of_Shows

>I'm not sure that's true. I'm under the impression that he had everything himself and kept it. Unfortunately he refused to allow it to be re-aired etc because he hated what they might do to it (increased commercial time, for example). I think he's still with us, but I'm not sure of his health etc. Maybe one day his heirs will allow it to be transferred it if actually is still available.