An Australian couple turned over their Paris vacation video to police today after French investigators asked to examine the original for clues to the death of Princess Diana. They had given French investigators a copy of the video in November. The tape was shot outside the Ritz Hotel on the night of the Aug. 31 crash that killed Prince Diana, companion Dodi Fayed and their driver. French police hope the tape can be used to identify a mystery car they suspect was involved in the crash. The video reportedly shows a white Citroen AX, a car of similar size to the white Fiat Uno that French police have been seeking.