The video is a web-rip from the Bilibili Global streaming platform.
The Matroska format, which allows multiple subtitle tracks and audio streams to be bundled in one file. [ ] - 09 (B-Global 3840x2160 HEVC AAC MKV) [79D...
Based on standard release patterns for this naming convention, here are the technical specifications: The video is a web-rip from the Bilibili
A standard compressed audio format (Advanced Audio Coding). [ ] - 09 (B-Global 3840x2160 HEVC AAC MKV) [79D...
Also known as H.265 , this high-efficiency codec allows for high video quality at relatively small file sizes.
This is 4K (Ultra HD) . Note that most TV anime is produced at 720p or 1080p, so these 4K files are often upscaled by the streaming platform or the release group.