Tom from the Google Chrome Developer Relations team here… We use GitHub a lot, among other things for so-called Explainer documents (see https://youtu.be/GSiUzuB-PoI from about 5:25 on) when we propose new browser APIs.
For some of the Explainers, we use animated GIFs to outline how the UX for a new API could look like. The problem with them is: some people love them, but some people also really hate them. It would thus be great if GitHub respected the
prefers-reduced-motion media query, so people who dislike animated GIFs could easily opt out. Ideally, you’d deliver a click-to-play experience to those users.
Thanks for your consideration.