Ensure the file actually ends in .mp4 .
If the file was corrupted during download, renaming it to remove special characters (if any) might help.
It is an MP4 video file, which is highly compatible with most modern devices, including smartphones, tablets, and computers.
If you can tell me where you encountered the term "Bhdasmp4" (e.g., in a file download, a video editing app, or a specific website), I can provide more tailored information.