Microsoft is adding native support for newer audio and video codecs to the upcoming Windows 10 OS release, the new codecs to come pre-installed with Windows would be MKV - the high-quality container format which can have multiple streams of audio and subtitle along with video, High Efficiency Video Coding (HEVC) or H.265 - the successor to de-facto video compression standard MP4 V.264 and FLAC - the high-quality, lossless audio format loved by audiophiles.