What is "flexplay"

Flexplay is a trademark for a DVD-compatible optical video disc format with a time-limited (usually 48-hour) playback time. They are often described as " self-destructing" although the disc merely turns black and does not physically disintegrate. The same technology was used by Disney's Buena Vista Home Entertainment under the name ez-D. The Flexplay concept was invented by two professors, Yannis Bakos and Erik Brynjolfsson, who founded Flexplay Technologies in 1999. The technology was developed by Flexplay Technologies and General Electric.