I have an ipad 3 and I have collections of downloaded MKV videos converted to iPad 3 compatible video formats. The program I am using is PAVTUBE Video Converter which provides presets for iPad 1, 2 and 3. The output movies play perfectly in my iPad 3. In my experience, video quality is based more on video bitrate. So please set the bitrate of output ipad video as its original value to keep TX55 video intact quality.