Rename your subtitle file to: Vampires.1998.720p.BluRay.x264.[YTS.AG].srt Keep both files in the .
Because your video is a specific rip, you must find a subtitle file that matches the "720p BluRay x264" source. Subtitles for different versions (like DVD or Web-DL) will often be "out of sync" because of different frame rates or opening logos.
Open the video with a player like or MPC-HC , and the subtitles should load instantly. 3. Manual Loading
The simplest way to get your media player to recognize the subtitle automatically is to make the filenames identical.
Locate your video file: Vampires.1998.720p.BluRay.x264.[YTS.AG].mp4
Search for "Vampires 1998 YTS subtitles" on reputable sites like OpenSubtitles or Subscene.