Reply To: Video in iPad document

This question has been asked many times and answered by Anne-Marie Conception:

In my lynda.com video title on Creating Fixed Layout EPUBs with InDesign CC, I show how to embed videos as well as link to ones you host yourself.

https://www.lynda.com/InDesign-tutorials/Creating-Fixed-Layout-EPUBs-InDesign-CC/169624-2.html

To embed videos, you need to convert them to h.264 encoding, then use the Media panel to bring them in and add a poster image. Be sure you choose EPUB 3 when you export. This works for both reflowable and fixed-layout epubs.
The ereader device you use has its own programming to “go full screen.” It’s not something you can include in the code. Typically, though, they’ll go full screen as soon as you start to play it.
Hope that helps!
AM