What are you using to watch the movie (e.g., a specific streaming service, a local BluRay rip, or a digital download)?
Once you have downloaded the .srt file, adding it to your media player takes only a few seconds. Method 1: The Automatic Matching Trick
It's common for subtitles to be slightly ahead or behind the video. Here's how to fix it in VLC:
If you are watching the film on an online streaming platform, you can use browser extensions. Some are designed to extract subtitles from sites like YouTube, Netflix, Disney+, and Prime Video , and save them as SRT files.