When we got confirmation about FLAC support coming to Windows 10 for Phones then we had wondered about MKV support too, considering the fact that MKV support was added platform wide and is already available on Windows 10 Desktop. But with Microsoft you can never be sure enough and now good news is that MKV support for Windows 10 for Phones gets confirmed.
@Eegore8a MKV support was added at platform level, so will work for phones and PCs (same code!) This is a big advantage of common platform.
— Gabriel Aul (@GabeAul) February 12, 2015
We had included native FLAC and MKV support in our Windows 10 expected features list, before Windows 10 for Phones was officially unveiled. Reason is quite simple, Windows 10 Desktop already had it and the underlying OS core being the same, we thought it will be present in Windows 10 for Phones too.
Thanks Nate for the tip. Cheers!!