Macromedia Inc. and Speedera Networks on Monday launched a secure delivery system for Internet video aimed at boosting pay-per-view video and other online subscription services. Macromedia, a multimedia software maker, said the secure service for streaming its Flash video over Internet connections would help media companies and advertisers protect everything from music to movie trailers from piracy. The service ensures that content can only be played from its intended Web site, while the site"s address cannot be mass-mailed to unauthorized users.