TServo2049 said:

Actually, now that I think about it, the presence of the clouds on the ITV print actually makes some sense - remember, it also lacks the Tantive burn marks, which means that the picture might have been derived from the same, or at least a similar, film source as the official video masters of the era. (I wonder if it has some of the same damage, like maybe those dark blobs during the saber training...)

After my quick look, the ITV appears to share the exact same splice glue as the 80's video masters, including the last reel up to the group shot before the credits. Makes a lot of sense as it also lack those tantive corridor marks. The opening crawl splice and the dissolve to the end credits makes this an odd beast...