This title is in English, but part of the film is about Korea.
Vision Video
https://www.visionvideo.com/dvd/501865D/gospel-films-archive-martyrs-and-missionaries
Amazon
There are three films on this dvd. This is one of them.
Word of Fire (1977, 25 minutes): Throughout the ages it has always been Satan’s purpose to destroy the Bible. Through Roman Caesars, through Korean rulers, African Queens, and Communist governments. But God has been faithful to keep the Bible alive through His people. Learn the terrible price that others have paid so that we and our children can have God’s revealed word.