First video's actually really interesting once it gets to gameplay. The train looks to have a different design, and I don't think that weird shudder is ever in the game. The cut-ins have a tearing animation that's either not in the final game or sped up in it. The thieves seemed to always use Leblanc as their base, rather than moving there only in the late game.

persona 5 trailer 1:

1. 1:07 that train scene where akira was in didn't happen at game, which means it was planned to be connected at the train accident at that time (maybe)
2.1:15, 1:17: so that red thing, where it shows ryuji's and ann's faces at the background was red, at the final game we see it a bit of black or gray
3.1:19 we see mona at it's original form, with no real cat form, which in the end of the game, we see mona that was a shadow, not a human after all.( although we see mona's cat form at 1:30, which that means mona had a cat form after all, or it's model wasn't complete back then)
4.from 2:00 to 2:05: we see these didn't also make it to the game, except the moment from ann, ryuji, mona, was made at game (except for these moves, it didn't make to the game) they pushed akira when he is about to die.
(i hope my explanation didn't get well...)

Persona 5 trailer 2:

1. the battle theme music seem'd to be very different from the actual game
2. that's it, nothing here...

persona 5 trailer 3:

1. 0:18 i say this anime cutscene only showed akira, ann, ryuji, yusuke, and morgana, but they didn't show makoto, to avoid spoilers.
2.from 0:41 to 0:49 if you notice the date at 4/22 and 4/20, it is the days that kamoshida's mental shutdown happens, but the deadline didn't appear, which means it is to avoid spoilers or it wasn't finished at all.
3.0:52: the IM thing was called Sns, i do think it is only at japan or something, and there has to be some expiation that why isn't at the english version.(and ryuji's chat photo)

forgot something: the intro shows up the phantom thieves running, then atlus's logo appears

persona 5 tailer 4

1.0:43: atlus's photo shows up, then the phantom thieves opens the door, then running to it(and it has to be at the original game though, so it has to be cut or something, but it is cool though to have this)
2.3:50: akechi wasn't shown up at the animated cutscene, again, to avoid spoilers
that's it

i feel something weird within those trailer, that akechi wasn't shown up at any of these trailers

now can i relax? my mind is now clear.