Back on September 9, 2009, Apple introduced iTunes Extras, an HTML5-based way for studios to include digital versions of director's commentary tracks, behind the scenes videos, and the other kinds of bonus material commonly found on DVD and Blu-Ray. The original OS X 10.4 Tiger-based Apple TV was updated to support iTunes Extras, and it's musical cousin, iTunes LP. Then, on September 1, 2010, Apple announced an all-new, all-streaming, all-iOS second generation Apple TV, and... iTunes Extras didn't survive the transition. Not only that, they didn't get added back with subsequent software updates. On March 7, 2012, Apple announced the third generation, 1080p Apple TV, and still no iTunes Extras. Now, some 4 years later, iTunes Extras on Apple TV are still MIA.