Here’s an informative review of the release labeled:

remux: This is the highest quality available. It means the video and audio tracks were taken directly from the Blu-ray without being compressed or converted, just "re-packaged" into a single file.

Video: As a Remux, this file contains the exact video stream found on the retail Blu-ray. Expect a high bitrate (likely 25–35 Mbps) with no compression artifacts, preserving the sun-drenched, grainy cinematic look of Miami.

The Conflict: Dexter Morgan finds himself in an escalating "cat and mouse" game with Miguel Prado.

If you're looking for information on how to download, stream, or details about the content of "Dexter's" in this format, here are some general points:

The string "dexters031080pblurayremuxavctruehd51nogrp" refers to a high-definition digital file of a specific episode from the television series

NoGrp: This usually suggests the file was released without a specific scene or P2P "Group" tag, or by an independent uploader.