: The video resolution, indicating it is in 4K Ultra HD .

This filename refers to a high-definition digital rip of an anime or video content, likely sourced from (B-Global). The string specifically describes the file's technical specifications and source origin. Technical Breakdown

Rips from are often sought after in the anime community because Bilibili sometimes hosts higher-bitrate or higher-resolution (4K) versions of shows that other platforms like Crunchyroll may only provide in 1080p. However, B-Global releases are sometimes criticized for having lower-quality audio or different subtitle translations compared to official Western releases.

: The file container (Matroska Video), which can hold multiple video, audio, and subtitle tracks in one file.

: The video codec (High Efficiency Video Coding, also known as H.265), which allows for high quality at smaller file sizes.

: The audio codec (Advanced Audio Coding), a standard lossy digital audio compression format.