Once you have downloaded the .srt (or .ass ) file, use one of these two methods to play it with your movie:

This guide explains how to find, download, and sync subtitles for specifically for high-definition BluRay rips (1080p or 720p). 1. Finding the Correct Subtitle File

YIFY Subtitles: Good for quick, simple downloads of SRT files that match popular encodes. 2. How to Load the Subtitles