The iAd Producer application from Apple has grown considerably since its inception. Originally, it was a highly specialized application that created advertisements for mobile devices from Apple. Those iAds were composed of sophisticated HTML, CSS and Javascript.
Since that inception, it has been expanded to create iTunes LPs for music albums sold in the iTunes Store and iTunes Extras for video sold in the iTunes Store. These, too, rely upon HTML, CSS and Javascript web technologies. Most recently, iAd producer has added iBooks Author HTML widgets to its repertoire. Thus, the following screencast tutorial showing how easy it is to use iAd Producer to create a high quality HTML widget for iBooks Author without writing a single line of code.
This example focuses on creating an HTML widget that plays a video hosted on an external server. This keeps the size of your *.ibooks file down making for quicker downloads and avoiding becoming a burden to iPads already nearly filled to capacity with other books and media.
Try viewing this video in full screen to catch all of the details. Note that Firefox doesn't like MPEG-4 and will refuse to play this. Try any other modern web browser (Safari, Chrome, etc.).
Download the example book to an iPad to get an even better view of how this looks and feels in the hands of your audience.
Download iAd Producer (free developer registration required)