While there is no official industry-standard report for this specific filename, it most commonly refers to fan-captured "fancams," official behind-the-scenes clips, or social media edits.
.mp4 (MPEG-4 Part 14), a universal container format compatible with almost all media players and social platforms. Common Origin: Yeji-001.mp4
Likely a high-definition (HD) performance clip, a "bubble" (private message app) video leak, or an Instagram story archive. While there is no official industry-standard report for
If this is from a specific "master" or fan project, check the associated metadata/EXIF data for the original upload date and camera source. If this is from a specific "master" or
Professional photographers often use sequential numbering (001, 002) for raw video files from concerts or airport appearances.
1080p (1920x1080) or 4K (3840x2160) for modern fancams.
If you are looking for the technical "report" of the file's properties, it generally falls within these parameters for K-pop media: