In an industry first, 20th Century Fox is expected to announce Tuesday that the special-edition DVD of “Live Free or Die Hard” will come with an electronic copy of the complete movie that can be played on a computer and select portable video players.

“This may be the killer app, where you have physical media that allows you to have a big-screen experience and at the same time move the file around to other devices and have a great experience there as well,” said Mike Dunn, worldwide president of 20th Century Fox Home Entertainment, the studio’s home-video division.