This indicates the original platform that hosted and distributed the content. Apharan Season 2 was released on Voot Select (which has since integrated with JioCinema). Knowing the source platform confirms that the asset originates from an official digital broadcast.
: In Season 2, Inspector Rudra Srivastava (Arunoday Singh) is sent to
Given these specifications, "Apharan S02 1080p Voot WebDL DD51 x264 ESUBS" seems to describe a high-quality video file of Season 2 of the series "Apharan", downloaded from Voot, encoded in H.264, with Dolby Digital 5.1 audio, and English subtitles.
: This refers to the resolution of the video. 1080p is a high-definition (HD) resolution of 1920x1080 pixels, suggesting that the video quality is quite high.