The filename appears to be a standardized naming convention for a video file, likely a television episode, hosted on a file-sharing or torrent site. ep-123 : The episode number.

: These are often internal tags used by specific uploaders or sites to denote "Exclusive" content or specific release groups (e.g., "FE" might refer to a specific encoding team). s02 : Season 2 of the series.

: The file container format (Matroska Video), which is popular for its ability to hold multiple audio tracks and subtitle streams.

: The resolution. While 480p is technically Standard Definition (SD), uploaders sometimes add "HD" to signify it was downscaled from a high-definition source, maintaining better clarity than a standard rip.