The latter half of the keyword——is almost certainly a timestamp or a duration marker.
Where fans look for high-quality subtitles (ENGSUB) provided by specific "fansubbing" groups. MEYD-595 ENGSUB02-50-21 Min
The use of "Min" (minutes) alongside a specific timestamp helps collectors and database managers verify that they have the "full version" of a file rather than a truncated or compressed edit. Why Do People Search for This Specific Code? The latter half of the keyword——is almost certainly