The string you provided is a specific file naming pattern used by the anime release group (associated with Bilibili Global). This naming convention is standard for high-definition (1080p) web releases using the HEVC (H.265) video codec and AAC audio in an MKV container.
Because and MKV are more advanced than standard MP4 files, users occasionally run into trouble. You might include these tips in your post: [] - 05 (B-Global 1920x1080 HEVC AAC MKV) [344B...
(In Another World With My Smartphone Season 2) Spy × Family The string you provided is a specific file
If you are writing a blog post or troubleshooting these files, here are the key technical details: a standard high-quality compressed audio format.
: Advanced Audio Coding, a standard high-quality compressed audio format.