: The Matroska multimedia container, which allows for multiple audio tracks and subtitles in a single file.

: A highly efficient video compression standard that provides high quality at smaller file sizes compared to older standards like H.264. AAC : The audio codec used (Advanced Audio Coding).

Automated systems like Medusa on GitHub often encounter these specific B-Global naming strings when parsing new episodes. For example, the series (The Misfit of Demon King Academy Season 2) has been distributed with this exact metadata structure. A/341, "Video - HEVC" - ATSC.org