PL denotes the inclusion of Polish language support (typically a "lektor" voice-over or subtitles).
.mkv (Matroska Video), a container that often includes multiple audio or subtitle tracks. Elvira.S01E05.PL.WEB-DLx264.mkv
Elvira Clancy, played by Siobhán Cullen , is a macabre-obsessed obituarist for a local newspaper in the town of Kilraven. PL denotes the inclusion of Polish language support
WEB-DL (Web Download), indicating the file was ripped directly from a streaming service (like Hulu or RTÉ). played by Siobhán Cullen