Delete the unwanted parts and download the remaining segment as a new MP4 file.
Use the Split tool to separate that section from the rest of the video. 81010.mp4
Drag and drop your 81010.mp4 file into your chosen editor. Delete the unwanted parts and download the remaining
For a built-in option, open your video in the Windows Photos or Clipchamp app, move the seeker to your desired point, and use the Split (scissors icon) or Trim tool. 81010.mp4
How to split or cut videos and audio assets - Microsoft Support