Usually offers the widest variety of versions, including those synced specifically for Blu-ray, DVD, or streaming rips.
Ensure the subtitle file has the exact same name as your video file (e.g., Get.The.Gringo.2012.mp4 and Get.The.Gringo.2012.srt ).
Most available files are in .SRT (SubRip) format, which is universally supported by media players like VLC, Plex, and various Smart TVs. Common Sources for Subtitles