Behind The Scenes with King Kong in Special Effects
EDIT: I just looked at some Amazon.com reviews and it look like this video is a behind-the-scenes look at how King Kong was created for the Special Effects film. Neither reviewer mentions any Star Wars sequence on this video.
More investigation shows that the runtime of this video is 33 minutes, while the actual IMAX movie is 40 minutes. Could this video be a stripped down version without the Star Wars sequences?