Check the "Date Created" and "Encoded Date." This can tell you if the video was recently rendered or is an older archival piece.
While "remote_control_21.mp4" specifically hasn't surfaced in major databases, similar titles often relate to: remote_control_21.mp4
Where the file was discovered (e.g., a specific Discord server, a GitHub repository, or a suspicious email) is the biggest clue to its intent. Check the "Date Created" and "Encoded Date
If you have the file and need to identify its purpose, check these metadata points: a specific Discord server
It is common for security camera clips, stock footage, or project assets to be named this way. If this is a file from your own device or organization, it likely depicts a specific test of a remote-control interface or a recorded snippet of a broadcast.