Frequently used for "Fansubs" or high-quality Blu-ray rips because it handles multiple subtitle languages better than .mp4 .
The .mkv (Matroska) extension is a flexible container format often used for: 17 - Hero.mkv
A nameless defense officer recounts his battles against three legendary assassins to the King of Qin. 4. Technical File Details (.mkv) Frequently used for "Fansubs" or high-quality Blu-ray rips
It is often ranked #17 or similar on lists of the Best Martial Arts Movies of all time. 17 - Hero.mkv