: It may be a raw or exported clip for a project, possibly a YouTube video or a scene from a larger Tamil film production.
: As an MP4 file, it is a digital container designed to hold compressed video and audio data using the MPEG-4 Part 14 standard. f4_tamil.mp4
: It could be a personal recording or a clip downloaded from a social platform or movie site. How to Open or Manage the File How to play MP4 files in Windows - Microsoft Support : It may be a raw or exported
: The "tamil" suffix strongly suggests the audio, subtitles, or subject matter is in the Tamil language. f4_tamil.mp4