I was thinking about the argument that has been made that the extreme and rich colours of the vhs tape of The Immortal Story are more accurate that the more muted colours of the "official" dvd release, and that Kurant's comments possibly support this, in that he maintains they had to have more contrast for the limited colour spectrum of the early colour TVs. The truth is that we might not know the original colour range, as colour negatives, especially from the late sixties, are notorious for being unstable. In addition, the DVD people might have adjusted the colours for today's aesthetics, just as the Kane DVD people lightened that film far too much, thinking they were "improving" it. Also ,we have the added question, as you have mentioned, that the film was clearly made for TV in 1966, and then in 68 or 69 it was given a theatrical release, and whether or not Welles and/or Kurant adjusted the colour for cinema showings. The really interesting thing for me is that The Heroine was filmed in 1969, and was intended as the companion piece to The Immortal Story for it's theatrical release, as together they would make up a 90 minute show. Since Welles abandoned The Heroine shoot, it looks like (from the above Press book) that Reichenbach's documentary on Welles went out as the companion piece instead (and went on to win the "Best Short" film award at the Berlin Film Festival). And since The Heroine was a 1969 shoot, it seems as though The Immortal story was both broadcast and shown at festivals in 1968, but was perhaps not shown theatrically until 69.
Another question, possibly related to the above, is what Glenn has noted, namely the very large camera in one of the photos looks like a TV camera, but in other shots, Kurant is using a much smaller camera, and writes about using a hand-held in the article.
At any rate, this is a little studied period of Welles; I remember how for decades The Merchant of Venice was not even known about at all. And Kurant seems a fascinating source: I wish we could interview him for the site. :;):