The latest update to iTunes (11.3) adds Extras, or bonus content that comes with HD films on Apple's downloading platform. Extras may be viewed directly through iTunes or on Apple TV and will also be available on iOS 8 starting this fall.
Similar to the bonus content provided on DVDs or Blu-rays, iTunes Extras may include behind-the-scenes videos, shorts, HD photo galleries, director's commentary and cut scenes.
Extras may be viewed through iTunes or on Apple TV, which has also just been updated. The feature will also be available on iOS 8 this fall.
Apple notes that available Extras will be added automatically to iTunes users' previous HD video purchases at no charge.
Check out the first iTunes Extras: itunes.com/iTunesExtras