Hello, thanks for writing in about this, and sorry for the delay in getting back to you. I checked and verified that animated gifs are not a supported format for posts.
However, this sounds like a good idea to share to our Ideas Board so that others can also vote on your idea. We kindly ask that you review our Idea Guidelines, particularly the “What makes a good idea” section, to ensure that your ideas are clear, concise, and can reach as many others as possible.
Thank you for your contribution, we value your input.
STRAVA | Community Hub Team