Typically .srt (SubRip) or .ass (Advanced Substation Alpha) Film Synopsis

If the text is slightly out of sync, most players allow you to adjust the "Subtitle Delay" (usually using the G and H keys in VLC).

In players like VLC or MPC-HC , simply drag and drop the subtitle file onto the video window while it is playing.

While the audio codec (DD5.1) doesn't change the text, it indicates this is a high-quality release, and the subtitle file likely includes "SDH" (Subtitles for the Deaf and Hard-of-Hearing) to describe sound effects or musical cues.

Ensure the subtitle file has the exact same name as your video file (e.g., Chaos.Walking.2021.1080p.WEB-DL.DD5.1.srt ).