This indicates that the version of the video includes English subtitles, making it accessible to an international audience.
When you encounter the string you are likely looking at a specific metadata string used by online streaming sites or search engines. ssis477 engsub024000 min top
As an S1 release, the production values are high, often available in 4K resolution on official platforms to capture the fine details of the performance. Yua Mikami's Legacy This indicates that the version of the video