If you found this in a hidden folder, it may be a cached video or an ad from a mobile game or app. How to safely check the content:
Because this is a private file on your device or cloud storage, I cannot "see" or play the video. However, here is what that specific filename usually indicates: xdut (5).mp4
Use a universal media player like VLC Media Player , which can often play files even if they have slight corruption or unusual encoding. If you found this in a hidden folder,