WorstUsernameEver
But best title ever!
It's definitely t45-d, just slightly redesigned and possibly, in the actual setting of the game, modified/customized by someone (someone had been working on it, at least, judging by its state). There's also a mostly faithful t51b model in the trailer, worn by a dude on what looks like a vertibird. I'm going to be optimistic and assume that guy is *not* from the BoS, because they are hardly the only faction to use that armor.