Hello! Will the animations work only if you download the prezi as MP4?
Yes, the animations you add to the elements such as images, charts, maps, texts, etc. will work if you download the project as a video. (Here’s also a tutorial on that: Downloading your designs as videos in Prezi Design – Prezi Support Center)
Other download file formats (JPG, PNG and PDF) do not allow such features. If you need to present your Prezi Design or share it with others, we recommend using the view-page link so that the project viewers have access to all of the interactive features and see the animations you’ve used.