: The "NSPS" prefix and the "445" number act as a SKU, allowing users to cross-reference the video with external databases to find titles, cast members, or release dates. Accessibility
Check actual duration with MediaInfo. If it’s exactly 130 minutes and 5 seconds (130.08 min), the file might have been cut from a longer source. Use ffmpeg -ss 0 -i input.mkv -t 02:10:05 -c copy output_cut.mkv to trim to original length.
Details on Converted Video Content - nsps445engsub
I should also consider the possibility that they need the subtitles themselves in English. Maybe they have a Korean or Japanese video with subtitles in another language and want them converted to English. In that case, the content would be the actual English subtitles that align with the video's timing.