I had much of this recorded on VHS way back when, but I caught part of the It's All True segment in 1992. I do not recall what station, but it might have been PBS as I do not remember seeing any commercials during the time I was watching. What was important was there were snippets I had not seen due to the commercials on the original US airing. I hope that if it ever does see the light of day, it's sourced from the original BBC material instead of the A&E version. Although that might also involve that the narrator may no longer be Ed Asner (Similar to the Planet Earth that had Sir Richard Attenborough replaced by Sigourney Weaver for the US run.)
I don't understand why they need to mess with these programs when they are fine as they were. Maybe I am wrong thinking that most people do not notice who narrates when choosing to watch a documentary.