I can provide more targeted safety advice based on your situation. File checker: Scan files for viruses - NordVPN
If a site asks you to download a "special downloader" or "player" to watch a "SmilyMP4" video, this is a major red flag for adware, spyware, or ransomware . Security Risks of Unknown MP4 Downloads smilymp4
Are you looking to or trying to remove a potential threat ? I can provide more targeted safety advice based