I'll throw my 2 cents in here. I've spent the past hour or so trying to get the video off of the iTunes versions of the books with no luck.

It's easy enough to get the M4V files from each book. Just use an unzip utility to extract them.

I tried 3 different programs people have sworn by that removed DRM from M4V iTunes videos, but the problem is, each program opens iTunes and looks for the videos. So they will strip a bought/rented TV show or movie.

If I drag the files over the open program they get recognized but the conversion fails each and every time.

Unless someone figures out how to strip the DRM from each file directly, I think the only option is to output the video to a TV or PC via various cables/hardware and use the TV/PC as a pass-through to then capture the video as it plays.

Unfortunately I don't own anything that does this.