How Star Wars was saved in the edit:
https://youtu.be/zEHRNS-Scrs - from the RocketJump Film School YouTube channel (2017 - 18 mins long).
The blurb:
“A video essay exploring how Star Wars’ editors recut and rearranged Star Wars: A New Hope to create the cinematic classic it became”
Written by David Welch.
Narrated and edited by Joey Scoma.