Software will play, but for hardware acceleration, you need to have a decoder that supports NVDEC and video card was Nvidia 700 or 900 series. I checked on GTX950, LAVFilters and MPC-BE and MPC-HC, on XP x32 h265 8bit plays, but there are artifacts, apparently the driver is such, but on XP x64 h265 8bit plays without problems. Hardware acceleration h265 10 bit is not supported by NVDEC in 700 and 900 series, appeared only in 1000, but there are no drivers for it on XP.