Do not keep engsub as hardsubs if you plan to archive for 5+ years. Languages and subtitle formats evolve.
Add a metadata tag inside the engsub file to credit the original converter: SONE-431-engsub convert02-10-18 Min
: For subtitle conversion, tools like Subtitle Editor, Aegisub, or online converters can be useful. Do not keep engsub as hardsubs if you
[Script Info] Title: SONE-431 English Subtitles Original Conversion: convert02-10-18 by Min Last Mux: 2024 tools like Subtitle Editor