: The video resolution, indicating it is in 4K Ultra HD .
: The video codec (High Efficiency Video Coding, also known as H.265), which allows for high quality at smaller file sizes. [ ] - 20 (B-Global 3840x2160 HEVC AAC MKV) [B48...
: Likely a partial CRC32 checksum (a unique identifier used to verify the file has not been corrupted) or a release group tag. Source Context: Bilibili Global : The video resolution, indicating it is in 4K Ultra HD