Subtitle Black.panther.2018.1080p.bluray.x264-[... -

: Identifies the original source of the video as a physical Blu-ray disc rather than a web stream (WEB-DL).

: The "release group" that originally ripped and encoded the video. Subtitles must be matched to these specific groups because different groups may have slightly different start times or frame rates. 2. Technical Synchronization Details subtitle Black.Panther.2018.1080p.BluRay.x264-[...

: The subtitles are positioned to fit a 2.39:1 widescreen format. 3. The "Forced Subtitle" Requirement : Identifies the original source of the video