Cutting at non-keyframes (especially when using -c copy ) can cause subtitle drift. Solution:

to see if it corresponds to an episode number of a specific show (e.g., Running Man Episode 385).

Links related to this specific string often lead to file-hosting services:

(e.g., .srt to .ass or changing encoding/timecodes), you can use tools like Subtitle Edit, Aegisub, or online converters. Example: to shift all subtitles by 020002 (likely 2 minutes 0.02 seconds = 2 minutes and 20 milliseconds), you'd add +00:02:00.020 to timestamps.

: Short for "English Subtitles." This indicates that the media file either features hardcoded English subtitles or includes a separate timed-text track (such as an SRT or VTT file) translated into English for international viewers.