This paper describes the file format of High Efficiency Video Coding (HEVC), the newest video coding standard of the ITU-T Video Coding Experts Group and the ISO/IEC Moving Picture Experts Group. The HEVC standard targets at a wide range of video applications, including high-bitrate entertainment, Internet streaming as well as video conferencing. Mainly, this standard focuses on achieving the significant compression performance improvement compared with the previous standards in the range of 50% bit-rate reduction for equal perceptual video quality. This paper provides an overview of the technical features and characteristics of the HEVC standard focusing on its file format.