Hi Toddos, my remit was to look at ibooks and epub (I know that it isn't really part of epub as outlined by many posters). My publishers are looking eventually shifting their books onto many e-platforms. I've advised them that epub, kindle etc. is best to use static images/traditional eink etc. But they want to take advantage of the ibook/video for other reasons as I've posted in the past.
Thanks for all your comments though and have a great day