I remember about 12-15 years ago, as a weekend project, I reached out to the creator of OpenSubtitles dot org and asked him for a dump of all the subtitles, which he promptly and happily provided. I then indexed them all in elasticsearch (it was a pretty nascent tech at the time), and created a movie quote finder, with timestamps. E.g. you could search for "i love you" and it would tell you all the movies and timestamps that phrase would be uttered. My lazy ass didn't go beyond a localhost version, but I still remember fondly of having gotten that working, it felt like magic at the time.