I am developing a video player for the Gear 2, Gear S. 

According to the documentation both MKV anf WMV are supported.  I even got a recommendation from the app review group that I should support these formats in my applications.

HOWEVER

While I have no issue playing mp4,ogv,3gp both using the HTML 5 Video Element and the external application using application control.  Both return unsupported file type error when I give it either an MKV or WMV file.  The MKV is identical to a working MP4, just in a different container.  The WMV is one that I was sent by Samsung support as something I should add support for.

Any help appreciated,