Using the Windows version of QuickTime 7 is highly discouraged by security experts because Apple stopped providing security updates for it in 2016.
Go to the section under the Help or Player menu. buy quicktime pro
A popular cross-platform alternative that handles almost any file format and offers advanced playback and conversion tools. Using the Windows version of QuickTime 7 is
If you are looking for the features that QuickTime Pro once provided—such as video editing, file conversion, and full-screen playback—modern alternatives are now standard. Where to Find Pro Features Today including basic video trimming
The version included with macOS now natively supports many "Pro" features, including basic video trimming, splitting, and screen recording .