Can you, or can you not, see that in the Jackson photo, the thumb is pressed to the index finger, while in the lookalike frame from the newsreel, the thumb (which is too long) is parallel with the index finger? Think train tracks.
They are not the same, even though they are supposed to be the same split-second in time. Also note in the lookalike frame that there is an errant knuckle in the web area, plus the thumb knuckle is way too high. It isn't real. It's another freak hand. It's a little different from the other freak hand, but equally as freaky.