I didn't explain this as well as I should have, it links to an external website. After a longish (depends on your connection speed) it automatically plays the show. He doesn't make it available for download and I'll respect that.
In the jumble of ETs and kines that were returned to AFRTS. Some previously unknown early clips. Apparently 5 minute filler programs from kinescope. Somewhere there's a storage facility that must look a lot like the end of Raiders Of The Lost Ark.
Due to the expense of preserving videotape, NBC saved next to nothing prior to 1972.