Dr. Horrible's Sing-Along Blog DVD/Blu-Ray
On November 28, 2008 the Official Dr. Horrible website announced that pre-orders were being taken for the DVD. The following day Tubefilter reported that pre-orders of the Dr. Horrible DVD were "booming".
The DVD was released exclusively at Amazon.com on December 19, 2008 in the United States and on January 13, 2009 in Canada at Amazon.ca.
The DVD is region free. During pre-ordering the Amazon page stated the discs would be manufactured on demand using recordable media. Although some customers report receiving DVD-R discs (identified by a purple data-side), most are receiving pressed discs.
On June 2, 2009, a new release of Dr. Horrible's Sing-Along Blog was produced by New Video Group, which included the same materials as the Amazon DVD but was distributed through regular retail outlets. A Blu-ray version was released on May 25, 2010 from New Video Group.
Special features on the DVD and Blu-ray include Commentary! The Musical; commentary by the cast and creators; behind-the-scenes featurettes on the making of the movie and the music; the top 10 Evil League of Evil application videos from fans; and four easter eggs.
Commentary! The Musical
The DVD and Blu-ray versions of Dr. Horrible include as an extra Commentary! The Musical, a commentary track comprising entirely new songs performed by the cast and crew, thus creating a whole other musical on its own. The actors and writers sing various songs both as solos and with the entire company, playing versions of themselves. Commentary! is partly self-referential, and one of the co-creators, Jed Whedon, self-referentially comments that one song "wasn't even about the movie, it was about itself.", which he claims is as pointless as "breaking the ninth wall". As of January 5, 2010, Commentary! The Musical has been for sale on the iTunes Music Store.