This is actually noted in much of the 'uncanny valley' predictions, in that the positive and negative effects are less severe. A static picture can look human enough to fool you, however a video doesn't take long before something clues you in and at 24fps you're likely to clue in fast.
However zombies don't look as horrifying in still pictures as they do in animation. Catching the bottom of the uncanny valley can have its benefit for directors as well.
However zombies don't look as horrifying in still pictures as they do in animation. Catching the bottom of the uncanny valley can have its benefit for directors as well.