: For the player to load it automatically, the subtitle file name must exactly match the video file name (e.g., The.Wolf.of.Wall.Street.2013.1080p.BluRay.srt ).
For dedicated hardware, you can often adjust these settings in your Blu-ray player's Language/Subtitle setup menu .
How to set the subtitle Language on a Blu-ray player. - Panasonic
: Keep both the movie file and the .srt file in the same directory.