For a modern and secure alternative, you should use the latest QuickTime Player included with your Mac or a third-party media player like VLC.
Apple discontinued support for the Windows version in 2016 due to critical security vulnerabilities that will never be patched. QuickTime-7-Pro-Registration-Keys-Full-Version-Download
Support for legacy formats like QTVR, interactive movies, and MIDI files. Important Security Advisory For a modern and secure alternative, you should
For users on older systems (Mac OS X v10.5 or Windows Vista/7), the Pro version offered: For a modern and secure alternative
Are you trying to or just looking for a free video editor ? Download QuickTime 7.7.9 for Windows - Apple Support