If English subtitles are already hardsubbed (burned in), you cannot change them without re-encoding.
Based on the components of that string, the "interesting feature" likely refers to the technical fixes fsdss880engsub convert020354 min fixed
The "FIXED" label is only applied after a QC pass. This involves checking the full runtime to ensure: No Artifacting : Eliminating "blocks" or glitches in high-motion scenes. Audio Alignment If English subtitles are already hardsubbed (burned in),
Some common subtitle formats include:
refers to a video production, likely in the Japanese adult video (JAV) genre, featuring actress Sakura Momoi featuring actress Sakura Momoi