You can embed images, audio and video files in Pressbooks, as well as other types of multimedia. For video, most Pressbooks authors simply link to YouTube for videos they want to embed in Pressbooks books. However, you can also upload files directly to Pressbooks by adding them to your book’s media library. This page walks through how to display uploaded media in your book. Note there are size limits to how much multimedia content you can upload for use in your book (100MB for the free trial, 250MB for the Self-publisher plan, and 1GB for the Collaboration plan).