The animated gif in attachment does not animate in InDesign or when part of a published ebook. I used the Mac iBook to view it.
If InDesign cannot stay up to date with advancing file formats I don't think it will continue to be relevant! Embedding videos has never worked. Why are animated gifs not supported? What about glTF format? InDesign is widely used in design and architecture, but not for long if it doesn't stay current. Please, I want to video and animations in pdf's I share professionally.