0h4bjnze7jco3obrsqq9r_source.mp4 -

: Ensure it actually ends in .mp4 . Sometimes "double extensions" (like .mp4.exe ) are used to hide harmful software.

: Discord often renames uploaded files into long alphanumeric strings for its Content Delivery Network (CDN). 0h4bjnze7jco3obrsqq9r_source.mp4

: Use a tool like VirusTotal to upload the file (or its hash) and check if it’s flagged as malicious. : Ensure it actually ends in