Use a player like VLC or MPC-HC . In VLC, you can also simply drag and drop the .srt file onto the video window while it's playing. Troubleshooting Sync Issues
If the dialogue doesn't match the audio (which can happen if the BluRay rip has a different frame rate than the subtitle was made for): subtitle Disturbing.Behavior.1998.720p.BluRay.x...
Search for "Disturbing Behavior 1998" and look for entries tagged with "BluRay" or "x264." These are usually perfectly synced for high-definition rips. Use a player like VLC or MPC-HC
Primarily for TV shows, but they occasionally have movie subtitles with precise hearing-impaired (SDH) options. How to Use the Subtitle Primarily for TV shows, but they occasionally have
If you are looking for subtitles for the 1998 thriller specifically for the 720p BluRay x264 release, here are the most reliable ways to find and use them: Where to Find the Subtitle File