I've never seen some of these shots at the end, in any other documentary. It looks like its some sort of source tape of copied cut scenes+film/video? shot on location, that an editor would fast foward through to use in making a documentary. To my eyes the bts looks better than 8mm?

Edit: On a tangent I noticed this the other day in empire of dreams - what looks like a set up for a shot of R2 hiding behind some rocks which makes it look like the Blu Ray 'fix' might have been the original shot they were after in the first place (apologies if you already saw this) : http://tinypic.com/view.php?pic=k33ggn&s=5