Clicking links for such files often redirects to sites designed to steal personal information or flood your browser with intrusive ads.

Attackers frequently use provocative titles (e.g., "sexy video") to lure users into downloading files that contain Trojans or spyware.

If you encounter this file on social media, via direct message, or on a suspicious website, do not click it .

Ensure the file is actually an .mp4 and not an executable like .mp4.exe , which is a common trick to hide malicious programs. How to Create and Open an MP4 File

If you must open unknown media, use updated, sandboxed players like VLC which patch known vulnerabilities quickly.