I'm having a play with CS5.5 and have been delighted thus far with the embedded audio functionality. However, I'm having a bit of trouble with the video. I want to embed an MP4 to be read in an epub, both on an iPhone and an iPad screen. Is this possible? I know you can make images conform to screen sizes by rasterising them, but obviously one can't rasterise a video. Embedding the video at iPhone dimensions seems to mean watching a quite tiny clip on the iPad, but embedding video at iPad dimensions results in a video that just won't play.
Is there a workaround for this? I'd love for the epub I'm making to have that kind of flexibility - I don't particularly want to have to make a different book for every device out there.