I don't see any glaring flaws in the areas the topic starter pointed out, really, and I just watched the trailer again specifically to see if I would notice them. Now, there were a few problems I could name, the bad water, for one thing, but that's a problem with the water effects, not the character animations. And the lack of any reactions from the other characters in the tavern during the assassination was odd, but that's AI there, it has nothing to do with animations, and it may be tht we would have seen a reaction if the shot was held for longer. Now, the one problem I noticed that really might be an issue with character animations is in the third person combat scene at around 1:36 in the trailer (I mean the original unaltered trailer, not the video linked to in the first post.) it looked like there were parts where the swords didn't actually connect with the target and blood was spraying out of thin air, or the shields, but that could be an issue with hit detection rather than animations. Aside from that, it looked fine. Certainly, the animations are by no means the best I've ever seen, but in the quick, short scenes that are in the trailer, in fact, it seems like an improvement over past games in the series, though that's really not hard to do. Of course, my thoughts on the matter might change once I've actually played the game, in part because I could see the animations much more closely, and in part because even if the animations look alright on their own, that doesn't guarentee they'll flow naturally in gameplay, but I'll judge that when the time comes.
Now, I'm not actually especially confident in Skyrim's animations, because past experience with Bethesda's games has really not given me much reason to be confident in them, I won't hesitate to admit that animations are not one of the strong-points of Bethesda's games, but that's fine, because the animations weren't what I was playing the games for, the other aspects of the game more than made up for what they lacked in animations, I felt that way of Morrowind, I felt that way of Oblivion, and of Fallout 3 as well, and I'd also say that the animations have been steadily improving since Morrowind, it's just that ultimately, they're still not up to the standards of other games on the market at the time, I expect the same will be true for Skyrim, however, at least so far, I can't make any well founded criticisms on the game's animations, and regardless of how the animations are, I still expect to enjoy Skyrim, maybe not for the animations, but certainly for the game world an gameplay.
I only have one question, now. When fighting dragons, will that glorious music heard in the trailer be playing the background? It's going to feel so anti-climatic without it.
You never know, it's possible that the main theme will also be played during gameplay, in Morrowind, the main theme would sometimes play while exploring, though Skyrim's theme really needs to be combat music if it plays during gameplay (And I'll laugh at the inappropriateness of it if I hear that epic theme song while fighting rats