: These are often shorthand for "English Subtitled" or "Re-uploaded," indicating a version of the media that has been modified or restored to a server.
It seems like you've provided a string of characters that appears to be a jumbled collection of letters and numbers. This doesn't form a coherent question or request that I can understand or act upon.
: This part seems to represent a date, possibly in the format DDMMYY (21st February 2021), but without more context, it's hard to say for certain.
