: This is the Matroska Multimedia Container . Unlike MP4, MKV files can hold an unlimited number of video, audio, picture, or subtitle tracks in one file, which is why it is the preferred format for high-quality movie rips. Technical Context: HEVC and MKV
: This typically signifies the specific release group or the distributor (in this case, "uCM") that processed and uploaded the file to the network. world4ufree-u-cm-net-nengland-hevc-mkv
Files with these naming structures are generally associated with . Downloading or sharing such files carries several risks: : This is the Matroska Multimedia Container
: An HEVC file can be up to 50% smaller than an equivalent H.264 file without losing visual quality. or subtitle tracks in one file