While not in your specific file name, you may see the term "PROPER" in similar movie guides. A release is a corrected version of a film issued by a different group to fix technical flaws (like audio sync or frame issues) found in the original release.
: The original distribution platform or indexer where the file was first uploaded. What is a "PROPER"? Year.of.the.Dog.2007.HR.WEB.x264-REGRET[rarbg]
: The name of the Scene Group that created this specific encode. While not in your specific file name, you