: This stands for Season 1, Episode 1. It indicates that the file contains the first episode of the first season of the series.
The .mkv extension is a standard "Matroska" video container often used for high-definition video rips found on these types of sharing platforms. Advisory XWapseries.Fun - Pappadam S01E01 Yessma.mkv
XWapseries is a well-known pirate or "mirror" site that hosts illegally ripped copies of web series from various OTT platforms like Yessma, Ullu, and Prime Video. : This stands for Season 1, Episode 1
: The fact that the episode is available for download/streaming from a platform named XWapseries.Fun indicates it's accessible for fans of the series. The use of ".mkv" suggests it's in a format that's widely compatible with many media players. : This stands for Season 1