I agree for TV, but what about the case of the author, where he gets the episode from iTunes? Blu-Ray and iTunes episodes have a chance to have the intro timed

I agree for TV, but what about the case of the author, where he gets the episode from iTunes? Blu-Ray and iTunes episodes have a chance to have the intro timed perfectly the same as they are probably exported from a kind-of video editing workflow where they copy-paste the intro. At least, that's what I imagine. So the intro in their workflow is probably the same (I mean, the same video file), but somehow the export to h264 makes it different for each episode. Maybe the psy optimizations use dithering or another trick involving randomization.