: In Windows, if "Hide extensions for known file types" is turned on, a user might see "Her Highness.mkv" and add ".mp4" to it, resulting in the actual name being Her Highness.mkv.mp4 .
The . This is how the operating system will currently try to read the file. Technical Suggestion Her Highness.mkv.mp4
To fix it, try removing the .mp4 from the end so the file returns to its original .mkv state. : In Windows, if "Hide extensions for known
: Known for being an open-standard "everything bucket." It can hold unlimited tracks of video, audio, and—crucially—subtitles in one file. : In Windows
The . Likely a reference to a movie, drama, or specific video content. .mkv