I wonder if SE held on to the original uncompressed FFXII FMV files so they could make them look half way decent for an HD re-release.

They apparently didn't with X, so they just cropped and stretched out the 480p FMVs from the PS2 disc resulting in some less than stellar visuals on many of the FMVs, which was really my only gripe with that collection (well, aside of not making the new OST optional).