The x265 10‑bit encode offers better fidelity than a typical x264 8‑bit of the same size, and it’s often indistinguishable from the remux on a 1080p screen—provided the encoder used a slow preset and proper parameters.
The .MKV at the end of the filename signifies the Matroska container. Unlike formats like .MP4 , which have rigid specifications regarding what types of data they can hold, an MKV file acts as an open-source, highly flexible digital envelope. We.Were.Soldiers.2002.1080p.MKV.x265.10bit.HEVC...