Well I can say with some conviction you are the most interesting new member on this forum for some time (to me anyway).
Thanks VERY much for uploading that clip. It's clearly evident that it would have been a great resource to me when I was making 'Building Empire'. To be honest I am blown away to find out that there is another 'making of' doco packed with great stuff.
I hope that in time you will consider sharing this in it's entirety. This forum is full of people with a genuine love of the original trilogy. "The Making of The Empire Strikes" back would make a great addition to the list of preservations.
JD