: The file extension. MPEG-4 Part 14 is a digital multimedia container format most commonly used to store video and audio. Context and Usage
: Typically a database index or internal tracking number used by a specific release group or library. 3365-BR720p-SUBS-GETOUT.mp4
: Indicates that the file includes subtitles . This often means hardcoded subtitles (burnt into the image) or an embedded subtitle track. : The file extension