Because these identifiers vary between different service providers, the exact content of "6369.mp4" (such as the movie title) depends entirely on which or streaming database you are using.
In an M3U playlist, it is typically formatted as a URL: http://[server-address]/movie/[user-credentials]/6369.mp4 . 6369mp4
The identifier appears to be a specific video file ID found in IPTV playlist configurations (M3U files). According to playlist data from BROTHER'S PES , this specific ID is associated with a movie file hosted on an external server. Technical Context 6369mp4