This is the very first frame of the Lovelady clip from the Hughes movie. At least, it's the closest I can get to the very first frame. It occurs at 1 minute and 33 seconds.
Compare it to the one Unger put up, which occurred a split-second later but still within the 1:33 second.
So, what he did was carefully select a very stable frame, one that doesn't have weird shit in it (and there are a lot that do) and then I believe color enhancement was done since such striking color does not occur in the raw film.
The fact is that this Lovelady figure along the east wall in the Hughes film undergoes a transformation in which he manifests very weird and changing distortions which Unger completely omits. He only lets you see the good stuff.