My experience with the MKV files I have created with ByteCopy is that they play fine off the hard drive attached to the WDTV, and not well if streamed via my wired network. Streaming wirelessly is even worse. So, I stick with playing them off the hard drive.
BTW, playing DVD ISO files (non blu-ray files) work fine anyway I serve them up. I suppose the problems with blu-ray MKV files is that blu-rays have more complex data than standard DVD ISO files, and therein lies the problem.
