You can easily enjoy MP4 video on MP4 Player, X-box 360, PS4, iPhone/iPad/iPod, and Android devices. MP4 files are more user friendly in terms of copying, moving, uploading, and playing. Multiple MP4 files are easier to save and large or separate files can be saved into one single file. However, MP4 has much higher compatibility and better performance than MKV video on multiple Media Players, Mobile Phones, and Portable devices, that is why many users need to convert MKV to MP4. It has better support than MP4 for some features like subtitles, multiple video and audio tracks and chapters. MKV is also the basis of WebM video, which is dedicated to developing a high-quality, open video format for the web that is freely available to everyone. MKV is a flexible, open standard video file format wildly used for HD videos. MKV (Matroska) and MP4 (MPEG-4) are both container formats to store video and audio.