This update is recommended for all QuickTime 7 users. QuickTime 7 delivers numerous bug fixes and addresses critical security issues. When combined with QuickTime Player and QuickTime Pro, these applications work together to provide the industry's first end-to-end, standards-based digital media delivery system. QuickTime is a family of digital media software for creation, delivery and playback software lets you deliver live or pre-recorded video and audio to an audience of any size.