As a little follow up to my first post; Michel Parbot’s The Making of The Empire Strikes Back, as well as the interview I found of Mark Hamill on the DS set in 1976, Mielr has two more interesting oddities on her YouTube channel that I felt was worth sharing here.
Mark Hamill & Harrison Ford interviews - The Empire Strikes Back
https://www.youtube.com/watch?v=rOiNF8uB4Ho
Carrie Fisher interview - The Empire Strikes Back
https://www.youtube.com/watch?v=d-QFbOZJpc4
These clips are clearly outtakes from the Parbot documentary. The backgrounds, camera angles all match, but these particular clips do not appear in the finished film.