I think 343i should rethink their marketing strategy.
Don't get me wrong, those two vidocs plus everything else were amazing and really got me hyped, but 343i have made their point that this game is going to be amazing and they need to focus on other things... (Like the game itself). Otherwise the way I see it, is that we're going to get into Halo 4 with absolutely nothing new to be amazed by.
I mean we've seen every weapon, every armour piece, half the multiplayer maps, enemy types, how the game starts and we've even seen the script of a major plot point in the campaign! You get the point... and there are still two months until release! I remember going into Halo 3's campaign completely unspoiled, and it was amazing. Reach's was spoiled for me, and besides the horrendous script, I wasn't surprised at all by anything (Bungie's biggest mistake was showing us the Sabre gameplay before release, IMO).
I feel as if I've already played Halo 4 just by the sheer amount of content that has been released, and that isn't exactly a good thing.