Mjhyt678ytfvcds.mp4 -

Run the file through a local antivirus program or upload it to a multi-engine scanner like VirusTotal .

If you must open it, use a sandboxed media player like VLC Media Player rather than default system players. mjhyt678ytfvcds.mp4

This specific file naming convention is common in several digital scenarios: Run the file through a local antivirus program