Often shorthand for "minimum" (referring to file size or bitrate) or "minutes."
: This part of the string could refer to several things, but without context, it's difficult to say precisely. It might be an abbreviation or code for a specific title, project, or series. The "hmn" could stand for "human" or be an acronym, and "625" might refer to a line count (commonly associated with video resolutions).
If the "patch" didn't fully fix the sync, most players allow you to manualy adjust timing. In VLC, use the
Understanding Your Video File: "hmn625engsub" Conversion & Patches If you have encountered a file labeled "hmn625engsub convert023059 min patched"