If you have already clicked the link or downloaded the file, run a full system scan using a reputable antivirus like Windows Defender , Malwarebytes , or Bitdefender .
While labeled as an .mp4 (video), these files often contain executable code or scripts that run when "played" in a vulnerable media player or if the user is tricked into double-clicking a file that is actually an .exe with a fake icon.
Email attachment or direct download link. Technical Analysis
If this appeared in an unsolicited email or on a suspicious redirect page, it is almost certainly malicious. Recommended Actions Do Not Open: Do not download, preview, or execute the file.
Use your email provider's "Report Phishing" or "Report Spam" button to help their filters identify the campaign.