Using the Windows version of QuickTime 7 is highly discouraged by security experts because Apple stopped providing security updates for it in 2016.
A popular cross-platform alternative that handles almost any file format and offers advanced playback and conversion tools. buy quicktime pro
Go to the section under the Help or Player menu. Using the Windows version of QuickTime 7 is
The version included with macOS now natively supports many "Pro" features, including basic video trimming, splitting, and screen recording . including basic video trimming
Ensure you have installed (it is separate from the modern QuickTime Player).