Use Windows Photos to Trim a Video Clip
Windows 10 has a hidden video editor that works a bit like Windows Movie Maker or Apple iMovie. You can use it to trim videos clips very easily use the built in Photos App in Windows 10.
To edit a video file, open it in the Photos app. You can do this right from File Explorer by right-clicking the video file, and then selecting Open With > Photos.
The video will open and play in the Photos app. To edit the video, click “Edit & Create” on the toolbar.
You’ll see a variety of video editing tools you can use. Click a tool to use it. For example, to cut a section out of a video, click “Trim” in the menu.
To use the Trim tool, simply drag the two handles (labelled "1" and "2" below) on the playback bar to select the portion of the video you want to keep.
You can drag the blue pin icon to view what appears at that section in the video, or click the play button to play back the selected section of video.
When you’re done, click “Save a Copy” to save a copy of the trimmed section of the video. To stop editing without saving your changes, click “Cancel” instead.
The Photos app places the edited video in the same folder as the original with a similar file name. For example, we edited a video named "ISSOverhead.mp4" and received a video file named "ISSOverheadTrim.mp4".