You have the Blu-ray remux or a high-bitrate 1080p encode, as the extra resolution and audio fidelity of the Blu-ray are superior. Sample Filename Pattern Superman.1978.720p.WEB-DL.AAC2.0.H.264-Moniker.mkv (Group names vary — e.g., DON , SWTYBLZ , NTb , KiNGDOM )