The source material. BluRay rips usually have a frame rate of 23.976 fps; subtitles for "DVD" or "HDTV" sources will likely be out of sync.
The compression standard used to make the file size manageable without losing too much quality. subtitle The.Predator.2018.720p.BluRay.x264.[YT...
The group that released this specific encode. They are known for small file sizes and specific "hardcoded" metadata that requires matching subtitles. The source material
Even with the correct version, subtitles can sometimes be slightly ahead or behind. You can fix this manually in your media player: subtitle The.Predator.2018.720p.BluRay.x264.[YT...
A massive database where you can filter by the specific release name.