Subtitles? I really don't want to sign up to Opensubtitles and be hit with their ridiculous daily limit (on what is just text).

I was looking for a project just like yours and couldn't be bothered building one myself.

Edit: Gemini has provided some subtitles options.

Subtitle Search & Database APIs

• TheSubtitleDB.org: A completely free, open REST API for media players and apps. It requires no account, no API key, and has no rate limits, offering exact file hash matching as well as IMDb ID and TV episode lookups.

• Wyzie Subs (wyzie.io): A fast subtitle search API for movies and TV shows. It offers a free tier with 1,000 requests per day, sub-50ms response times, hearing-impaired filter options, and multi-language support.

• Opensubtitles-Unofficial-API: An open-source, community-hosted unofficial API. It lets you search and download subtitles from OpenSubtitle.