Just put it on a flash drive and plug it into your player. I’d be stunned if it couldn’t play the MKV (though you might have to remux with only one audio track and/or a non-DTS-HD MA track). Plus you won’t waste discs on something that might not work and you won’t have to deal with switching discs in the middle.
Well, 4K77 does indeed play off of a USB stick, but for some reason it’s really choppy like it’s playing at 6 fps. I made sure to re-mux with just one audio track. Did the same with 4K83, and that seemed to play fine. Only having problems with 4K77…