[ ] - - 21 (b-global 1920x1080 Hevc Aac Mkv) [dab...

This usually refers to the "release group" or the source (possibly a specific streaming service or regional broadcast). 1920x1080: The resolution, commonly known as Full HD .

The file container format (Matroska Video), which supports multiple subtitle and audio tracks. [ ] - 21 (B-Global 1920x1080 HEVC AAC MKV) [DAB...

Likely the episode number or a part of the series title. This usually refers to the "release group" or

The video codec (High Efficiency Video Coding, also known as H.265 ), which provides high quality at smaller file sizes. AAC: The audio codec (Advanced Audio Coding). also known as H.265 )

It looks like you’ve shared a for a video, likely a movie or TV show episode. Based on the formatting, essay: This is typically the title of the content.