Because horror relies heavily on sound design and atmosphere, MKV files often include multiple audio channels (such as 5.1 surround sound) and soft-coded subtitles in various languages.
Many Vietnamese production houses now host their content on dedicated apps or official YouTube channels, ensuring the best quality and supporting the creators.
MKV is a "container" format that can hold unlimited tracks of video, audio, picture, or subtitle tracks in one file. This allows for crisp 1080p or 4K visuals.