How to export PDFs with animated gifs

 I've been looking around the internet trying to figure out if this can be done or not. I'm finding mixed reviews. Some people claim that you can just place an animated gif into an Indesign document and export as an interactive pdf and it just works. And others seem to say that pdfs don't actually support that sort of function. I have tried placing some animated gifs I've created and they export as static images.

Does anyone know what the deal is? Maybe I'm seeing old information... What's the latest functionality with Indesign and pdf viewers these days in regards to this?