H.265 (HEVC) is the successor to H.264 (x264). Compared to x264, x265 offers approximately 50-60% better compression at the same quality.
Which would you like?
The desaturated, blue-toned color palette of the film relies on subtle color gradients that 10-bit x265 handles beautifully. "O Work" - Understanding the Quality Source prisoners 2013 720p 10bit bluray x265 hevc o work