Hi Geraldine Black,
Since you only need one continuous 20-minute section, you may be able to do this directly in the Photos app without installing anything else.
Open the video in Photos, select Trim or press Ctrl + E, then move the two markers to the beginning and end of the section you want to keep. When it looks correct, choose Save as copy so the original four-hour recording remains unchanged.
For an older VHS transfer, I would recommend keeping a backup of the original file before editing. If Photos has difficulty opening or processing such a long video, Clipchamp is a suitable alternative already available on Windows 11.
Before starting, copy the video from the USB to your laptop and make sure there is enough free storage, as a four-hour recording may take some time to import and export. If Clipchamp cannot open the file, check its file extension, as an older or uncommon video format may need to be converted first.
You can also refer to Microsoft’s guide here: Edit photos and videos in Windows Thank you so much for your understanding.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.