could you post a picture of what type of artifacts you're seeing? I dl'ed the vid and put my brightness up and i'm noticing maybe very very slight noise on the blacks, which to me just looks like something similar to high iso on a slr camera type noise. it is very very feint though and i can't really notice it.
i'm sure we all have different levels of what we consider great quality, but maybe it is a batch issue in production? because i'm quite happy with the display.