I've always loved this interview. In 1976, shortly after it aired, I came into possession of an audio cassette copy. I kept it for years but eventually somehow lost track of it.
In 1990, I found a multi-generation video copy at a con. That's the copy YouTube has (not my copy, but the same source video).
In fact, my copy is a considerably better digital transfer. At one time I owned a VCR/DVD Recorder, so I could directly dub from videotape to DVD. I made a copy of this and the studio version of "Where No Man Has Gone Before."
I need to think about posting my "print" to YouTube now that 720p is possible ...
And don't get your hopes up: the video is no better, but you can watch all the artifacts of multi-generational videotape copies in HD.
Dakota Smith