Right-click the file and select Properties (Windows) or Get Info (Mac). A very small file (under 1MB) is likely a short clip or an ad; a larger file (above 10MB) is more likely a full video.
Use a universal media player like VLC Media Player , which can often play files even if they have slight corruption or unusual encoding. xdut (5).mp4
The (5) suggests this is the fifth copy of a file named "xdut" downloaded to the same folder. Right-click the file and select Properties (Windows) or
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: The (5) suggests this is the fifth copy
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:
Look at your recently used apps. Did you save a video from a group chat or a specific website right before this appeared?