One of the caveats of Apple’s attempt to disrupt the textbook industry is that the entry-level iPad not only costs $500 but it comes with a mere 16 Gb of storage. Have a few interactive books with video on the shelf like the new media-rich Life On Earth and you’ll run out of disk space in no time.

But here’s an interesting new setting in iBooks 2 that might help in addressing that challenge:

“Online Audio & Video”

Will it be used for embedding hosted video’s, piecharts, sound clips as an extra bonus to the book, or will authors use it to keep a trimmed download size of their books?