[Freeshadow]

as theducks already pointed out
ebooks readers in general don't do motion

so if (as you pointed out) said motion is crucial (and not only an extra) for your content why make it an epub at all? epub should be effectively useable on epub capable devices
as also already pointed out it even isn't part of the specs so you don't even want a genuine epub
I'm somehow sad that the only book existing about it actually encourages bloathing and polluting the format.

if you only intend to serve your dish on idevices, why not making it an app?

By the way - I read very interesting and instructive boooks on both topics you mentioned: crafts and meditation both without videoclips embedded (even no thumb-cinema animations in the page corners.

I wish apple would announce their own ipub format for ibooks and let people who want to suffer their ignorance of fonts and love of blinky flashy actually do it instead of bloathing around inside of a format meant for books i.e. for reading (yeah,
that lost and forgotten skill you know - there's actually a short story by Asimov just about that)

a book is a book not a presentation - it seems to be the same weirdnes now as this "make a powerpoint out of that we ar all too dumb to read"