You can embed audio and video inside a book to enhance a customer’s reading experience. This section describes asset requirements for video and audio and how to embed the content for EPUB books only.
Important: When sending books with embedded audio or video content, keep in mind that the maximum file size for the .zip file is 2GB. For usability's sake, the maximum recommended size is 500 MB. Larger files take longer to download and may become unwieldy on older devices.