Use your media player's hotkeys (e.g., G and H in VLC) to shift the timing in 50ms increments.
Only.The.Valiant.1951.1080p.BluRay.x264.AAC (or similar variants) Common Format: .srt (SubRip) Where to Find the File subtitle Only.The.Valiant.1951.1080p.BluRay.AAC...
This is the most likely place to find the exact match for a 1080p BluRay rip. Search for "Only the Valiant 1951" and look for the version uploaded for the "YTS" or "RARBG" BluRay releases, as they usually share the same timing as the AAC version. Use your media player's hotkeys (e