This TV documentary was broadcast on September 16, 1977. Just 4 months after Star Wars: A New Hope hit theatres. I remember being bummed that I missed it (because I didn’t own a TV in ’77). Hosted by R2D2 and C3PO, it gives a glimpse of the process that would spawn a whole new genre of film and create several new companies.
Some of it was shot while the movie was in production but much of it was recorded in that 4 month period after release, when it was clear that Star Wars was a phenomenal cultural-changing success.
It’s pretty obvious, despite his later claims, that George Lucas had no intention of filming the subsequent episodes until after the success of the original was well established.
From around the same time here’s Sir Alec Guiness on British TV being interviewed about the film:
Here’s another one that I’d never seen from sometime between A New Hope and The Empire Strikes Back. Narrated by Anthony Daniels, the clothing and hairstyles seem late 70s and there are no references to any of the subsequent films so it must be fairly early, ’78 or ’79.
I think it must be a BBC production but a search of IMDB and various other sources don’t provide a date or original source.