: Likely indicates "Original" audio tracks are included (often meaning no third-party dubbing or unwanted alterations).
: The file container (Matroska). It is popular because it can hold multiple audio tracks (different languages), subtitle tracks, and chapter markers all in one file. : Likely indicates "Original" audio tracks are included
: The resolution (1280 x 720 pixels). While lower than 1080p or 4K, it is often chosen for smaller file sizes while maintaining "High Definition" quality. : Likely indicates "Original" audio tracks are included