Using a subtitle file specifically timed for the "BluRay" or "x264" release is crucial for several reasons:

Blu-ray versions sometimes include slightly different timing for studio logos or transitions.

Much of "Thirteen Days" involves rapid-fire political jargon and military terminology; having accurate subtitles ensures you don't miss key plot points during intense Oval Office debates. How to Use Subtitles with Your 720p File

If they don't load, you can usually drag and drop the .srt file directly onto the video player while the movie is running.

Subtitles for DVD rips or TV broadcasts often have different start times or frame rates, leading to text that appears too early or too late.