Just a few small software modifications of the built-in media-player will make happy thousands of Philips TV customers, that play MKV video files from USB drive:
* choosing of an audio stream (to swithch to the needed or supported one);
* selecting the chapters of the video (to avoid using the poor rewinding);
* support of subtitles (we are from diffrent countries, you know);

All these features are present in the media-players of the Philips BD-players, so the code is known to the Philips programmers and porting of it will not be difficult.