Bl-ck-ad-m-2022-720p-h-nd-x264-1xb3t-2-mkv

: The Matroska Multimedia Container, a file format that can hold unlimited numbers of video, audio, picture, or subtitle tracks in one file.

: The video compression standard (codec) used. It is a free software library for encoding video streams into the H.264/MPEG-4 AVC format. bl-ck-ad-m-2022-720p-h-nd-x264-1xb3t-2-mkv

: The title of the movie and its release year. 720p : The resolution of the video ( pixels), categorized as High Definition (HD). : The Matroska Multimedia Container, a file format

: This is likely a "release tag" or "signature" from the group or individual who encoded and uploaded the file. Film Context: Black Adam (2022) : The Matroska Multimedia Container

The string can be decoded to understand the technical specifications of the video file: