If you are "looking into" this file due to security concerns or because it won't open, here is the relevant technical and safety information: 🛡️ Security Concerns: Malware & Exploits
A high-severity flaw once allowed attackers to execute code via a malicious MP4.
If your WhatsApp app and phone's operating system (Android/iOS) are up to date , these specific older vulnerabilities are patched and no longer a threat.
Can't download, open, or send media files | WhatsApp Help Center