Rename the subtitle file to match your video file exactly (excluding the extension). Place in one folder: Keep both files in the same directory.
One of the biggest headaches for movie watchers is desynchronization. If the subtitles appear even a second before or after the character speaks, it breaks immersion. This is particularly problematic with "Water Monster 2019" because there are multiple cuts of the film (different runtimes for various regions). The will match the specific frame rate of your video file. Water Monster 2019 English Subtitles Download --BEST