The creatures and the editors are the cornerstone of the game. It's what they've shown the most, and they've been researching and working on the procedural animation systems before they even decided they could pull it off. One would think they would have gotten it to work the way they wanted it to by now...and what I'm saying is that they HAVE gotten to work the way they want it, and that's what we see in this video. Whether its because of the movement speed, or balancing issues, or that's just how that particular creature ended up moving, it doesn't matter...I'm pretty sure that what we see of the creature movements in this video is what we'll get in the final. They've only got a few months before the creature editor gets released, and if they want to bring those creatures into the game, they better have the animation system working at 100%.
Go look through the movie again though. The running animations still look pretty good. The fishing animation works well. The pole doesn't seem to go through his body too badly. Dancing is a bit spastic, but it works. Attacking animations look good. Idle animations are good. The stunned gargoyle like creature stumbles back and forth realistically. And they even fall down rather well.
And if you look in the background right about the time the blue guy collects the skeleton and starts to scavenge the big carcass...it looks like there's a floating creature floating across the ground. It could be that its legs are really small and we can't see them, but it might be "flying" around. That animation looked pretty good too, from what little I saw of it.