It was one of the first titles to fuel the home video revolution.

In the vast, tangled history of the internet, few file names carry as much weight—or as much irony—as Debbie.Does.Dallas.mp4 . To the casual observer, it looks like a relic of the early file-sharing era. To a cultural historian, it represents the collision of 1970s "porno chic," a massive legal battle over intellectual property, and the ultimate democratization of media through digital piracy. 1. The Myth of "Porno Chic"

The transition from a 35mm film reel to a compressed .mp4 file is a journey through the evolution of home media: