In short, "Good report" in this context is likely a confirmation that the file is high quality, correctly subbed, or "clean" (free of viruses/fake files) according to whoever posted it.
Digital media distribution often involves specific naming conventions and the use of various platforms to reach audiences. Understanding how these systems work can provide insight into digital content management. Digital Media Identifiers and File Formats xxxmmsub.com - t.me xxxmmsub1 - NIMA-031-720.m4v