The bloopers are partially on the Ep3 2020 disc, but they’ve been cropped and have been re-encoded to 30fps or something because there is some significantly bad ghosting. I’ve never heard of it being on iTunes before though, but I’d love to see it if it is
I don’t think there was that much in it but If I recall correctly these clips were included with a book which also had a digital version.
Anyway basically the process at this time is to do the audio mainly and for this part Battle of Yavin and the begining is the most complex switching between mixes and extra sound effects and various re-arrangements and the odd new shot. So I think perhaps getting the hardest parts out of the way first is a good call as the other parts won’t or should not take too long.