Use tools like Video Downloader Professional on Chrome to detect and save MP4 files directly from the page.
I can provide much more specific steps once I know the platform. Combined MP4 Download for Video Records
Since I don't have direct access to your local files or private apps, here are the most effective ways to download or export that specific file based on the platform you are using: For Security Systems (NVR/DVR)
If this is a clip from a surveillance system (common with that timestamp filename):