I get the question all the time: “How can I embed a YouTube video into my DPS project?
My answer: a YouTube video that shows how to embed a YouTube video into your DPS project!
It is possible that InDesign won’t recognize the embed code that you copy and paste from YouTube, so you can always use the Object>Insert HTML option and paste your embed code there. If you want to use the video in a scrollable frame, this method won’t work in CS6. You will need to save the embed code to a file (called something like video.html) and point a Web Content overlay at it, allowing user interaction and turning on auto play.