🛑 A file masking as a video might actually be an executable script.

🛑 are frequently used by attackers to hide malware.

If you trust the file and have already downloaded it, follow these steps to make it playable: in your operating system settings. Rename the file to remove the confusion. Try changing the end of the name to just .mp4 . If it fails to play, rename the end to just .mkv .