Attackers often rename malicious executables or script files with an .mp4 extension to trick users into opening them.

When users upload or share videos on Telegram, the platform often renames the file using a long numerical string (a unique file ID) beginning with "1_". This helps the system index the billions of media files hosted on its cloud. 2. Common Contexts for Such Files

Unless you personally downloaded this file from a trusted contact or a known Telegram channel, it is best to avoid opening it . If you must investigate it, use a "sandbox" environment or a dedicated malware scanning service like VirusTotal to check the file's hash for known threats.

In many cases, files shared with generic numerical names are used to mask malware or phishing attempts. 3. Safety and Security Concerns