In order to solve Plex not playing MKV issue, an MKV Converter is needed to convert MKV to both Plex and TV compatible format. With WonderFox HD Video Converter Factory Pro, you can achieve your goal with no effort. This is a very professional and versatile video converter. First of all, it can change video format completely without quality loss, 500+ output video and audio formats are for your selection. In addition, it can directly convert MKV video to TV devices such as convert MKV to Apple TV. Apart from that, it is also equipped with advanced editing functions like remove subtitles from MKV, split MKV files, etc.