: If you didn't expect to receive this file, it's best not to open it. You can scan suspicious files using online tools like VirusTotal before running them.
Could you tell me or what the video is supposed to be about? I might be able to help you find the original source. How to play MP4 files in Windows - Microsoft Support Download XqEHDDKprtOLa1V mp4
: If your default player fails, the VLC Media Player is a highly recommended, free tool that can play almost any MP4 file, even if it has unusual encoding. : If you didn't expect to receive this
: Once downloaded, an MP4 file is a standard video format. You can typically open it by double-clicking it on Windows or Mac. If it doesn't open, Microsoft Support suggests right-clicking and selecting "Open with" to choose a media player. I might be able to help you find the original source