Many amateur creators name their files using this type of shorthand (e.g., "Video for [Character Name] Forever").
It is often found in older web archives or "abandonware" forums where files were named concisely to save character space. Vdx 4 Ev mp4
A standard MP4 for a 3-minute song should be between 20MB and 100MB. If it is significantly smaller (KB) or larger (GB), it may be suspicious. Many amateur creators name their files using this