Look for your exact file name on trusted subtitle platforms. Search for "After Ever Happy 2022 ION1 srt" on sites like: (Great for community-rated uploads) OpenSubtitles (The largest database available) Podnapisi (Excellent for active, verified matches) 2. Use Player Auto-Sync Features
This means the video was recorded and encoded from a streaming service (like Prime Video or Netflix).
If the subtitles are slightly ahead or behind the speaking actors, you can shift the timing manually using your media player: