The SubRip Subtitle file format, also known as SRT, is a widely-used text-based format for storing subtitles. SRT files contain timed text, which is displayed in sync with a video file. Each subtitle is represented by a sequence of numbers, a timecode indicating the start and end of the subtitle, and the text of the subtitle itself. SRT files are simple and easy to create and edit, which makes them a popular choice for adding subtitles to videos. Additionally, SRT files are compatible with a wide range of media players and video editing software, making them an versatile format for subtitle files.
SRT specification: https://matroska.org/technical/specs/subtitles/srt.html
SRT file examples: https://subtitle-example.com/examples/srt-subtitle-file-format-example/
Subtitle editing software: https://en.wikipedia.org/wiki/Comparison_of_subtitle_editors
Video players that support SRT: https://en.wikipedia.org/wiki/List_of_video_player_software#Subtitle_support
Subtitle format comparison: https://en.wikipedia.org/wiki/Comparison_of_subtitle_file_formats
OpenSubtitles: https://www.opensubtitles.org/en/search/sublanguageid-all/idmovie-107374
YIFY Subtitles: https://yifysubtitles.com/
Subscene: https://subscene.com/
SubtitleSeeker: https://www.subtitleseeker.com/
These websites allow you to search for and download SRT subtitle files for a variety of movies and TV shows. Please note that the availability of subtitles on these websites may vary and some may require you to create an account in order to download files.