I could have sworn I saw that happend (mud tires, drives into water, it washes off).

There's a particular part in the first video that I'm talking about, 6:23-6:38, that just doesn't look quite right.  Too much mud remains on the tires imo.  But, as I said, a very very minor nitpick.

Nothing right about what you're saying dude, you're seeing things here. The tank looks like it's being stopped because it's actually secured by a holder on the back of the Jeep. It's actually popping up in the air a bit as the vehicle lands or drops after rising into the air, so no the vehicle isn't just affected by latteral physics.

The can swings left when the vehicle swings the opposite direction and vice versa because that's how it is in real life. Air pressure causes that, along with inertia.

Sony have release the video on their Playstation channel, it looks much better than that leaked footage.

Games have been doing that for years.  Far Cry, for example.

Is it mud or is it clay?  

Best quality pictures we have, captured from gamersyde :

All of that is ingame footage

And Naughty Dog didnt cared about it for years until the Goty MGS5 came along

Uh huh.  So you're giving MGS5 credit for what others have already done because you're assuming that Uncharted 4 didn't have this until they played MGS5.  I see.

yes thats how it works, nobody cared about third person shooters until gears of war came out despite that resident evil 4 invented it

What on earth are you talking about?  You don't get to redefine history just because you want something to be true.  SOCOM, Max Payne, and Siphon Filter were hits before RE4 or Gears were released.  Stop making stuff up.

People will get pissed at this, but I just don't see how the graphics are excellent.  Yes, screenshots can make it look fine, but unless you're looking at the ground the whole time, it seems kind of meh. Anything that is even a bit in the distance seems flat and undetailed. Not to say the game looks good. We'll just have to wait till release.