.MKV is short for the Matrsoka file format. it gets a little dicey if u want to burn it to dvd, but here is a guide which tells u about the file format, and gives u a guide on how to play the format http://ld-anime.faireal.net/guide/mkv-eng
you will need to download some codecs, and u can use their suggested media players. really worth a read,
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