: Specifies the video quality is Ultra High Definition (4K) with High Dynamic Range , offering higher resolution and better color/contrast than standard HD.
: This is the tag for the release group or individual who ripped and encoded the file. TLOS.S01E01.HMAX.4K.HDR..DxM.part3.rar
: This stands for Season 1, Episode 1 (the series premiere, titled "When You're Lost in the Darkness"). HMAX : Indicates the source of the video is HBO Max . : Specifies the video quality is Ultra High