Embedding YouTube videos, Prezis, Slideshare or Author Stream and other PowerPoint presentations programs, etc. is easy to do in LiveText. You will want to create a separate section for each embedded file. See "Manage Sections." Add new sections and reorder them as you prefer.
To embed a video or presentation file, go to edit and choose "Source" in your section editor.
Paste your embed code in the text box. Save and Finish.
YouTube Video Embedded
Slideshare PowerPoint Presentation Embedded
I typically type a <p> before pasting to make sure there's a blank line.
Sharing Prezis - Embedding in LiveText