Warning Heresy Ahead
@
JackTrade - if all your 'friends and family' have Android devices you could give them an app rather than epub.
If you get a decent development tool, creating multimedia Android apps, especially for a fault-tolerant, single-platform, closed user-group, is not that hard. Development is easier, hence faster, and more fun than creating multimedia ePubs. And simpler for the users - they just install Jack's Masterclass.
BR