Nice thread! These links may be of some interest:

From Star Wars to Jedi The Making of a Saga (VHS) - Flickr
http://www.flickr.com/photos/nathanpbutler/9329919714/
Anyone know which (of 5!) are best video and/or audio quality?

From Star Wars to Jedi - YouTube
https://www.youtube.com/watch?v=XzmHgxA0jOA
It's up to 720p (should look good down-rez'ed to 480p). No burned-in subtitles, so it's not the JP laserdisc.

From Star Wars to Jedi the Making of a Saga DVD - Times Forgotten DVD
http://www.timesforgottendvd.com/index.php?act=viewProd&productId=91
Looks like someone made a laserdisc transfer -- "NTSC Region 1 DVD ... HAS NON REMOVEABLE JAPANESE SUBTITLES".