(1) - Downloadfile.mp4

: A true MP4 is a media file and cannot run code directly like an .exe file.

MP4 files explained: How to open and use - Adobe downloadfile.mp4 (1)

: The suffix "(1)" confirms there is already a file named "downloadfile.mp4" in that directory. Safety and Security : A true MP4 is a media file

: It is an MP4 (MPEG-4 Part 14), which is the most common digital multimedia container for video and audio data. downloadfile.mp4 (1)