Applesexual Yep, see the first post in the Stillcolor thread:
aiaf: If you play a 60fps video on a 60Hz display while dithering is enabled, you actually get no dithering in the video for the most part. There’s no time to dither.
Temporal dithering is what causes text to appear moving even when it's supposed to be still, shimmering backgrounds, and "twitching" colors (and does all of this purely for the purpose of making gradients look like 5 percent "smoother").
It's also what causes eye strain because the screen is physically moving but is trying to convince you that it's not moving and "just displaying a static page, trust me!!" — so your brain and eyes have to work extra hard to keep processing the text as if it is still.
However, if a video (or a fast paced video game) is being played, there's enough motion in most videos where:
1. the pixels that would have been temporally dithered if they weren't moving have already changed to an entirely different color, meaning there's "no time to dither" as aiaf verified a few weeks ago.
2. Your brain isn't really going to run into the same issue I previously described, because there wouldn't be any confusion between "whether the content is actually still or moving" if the content is intended to be perceived as moving anyway (because it's a video).
This is why the most significant problems with temporal dithering usually occur while reading a static webpage or document.