If the file is actually a series of images (like "IMG_6872.JPG") and you want to turn them into a video, you can use tools like Adobe Express Video Converter or the img2mov utility on GitHub.
Are you trying to a deleted video with this name, or are you having trouble uploading it to a specific platform? MP4 Converter for Free | Adobe Express IMG_6872MP4
Be cautious with unknown MP4 files received from untrusted sources, as they can sometimes contain malicious scripts or "malformed headers" designed to exploit media players. If the file is actually a series of images (like "IMG_6872
If you cannot open it, try using a universal media player like VLC Media Player or Windows Media Player . IMG_6872MP4