Claras
Solves a specific, narrow annoyance well: not having to scrub a long YouTube video to find one answer. Its own speech recognition for uncaptioned videos is the real differentiator over extensions that only reuse YouTube's captions, though the free daily cap will push regular users to a paid tier quickly.
Pros
- transcribes videos even without official YouTube captions
- chapter-linked summaries plus a chat interface for follow-up questions
- bulk processing of entire playlists
Cons
- free tier is capped low enough that regular use needs a paid plan
- Chrome-only, with no Firefox, Safari, or standalone app
- solo-founder product, so longevity and support capacity are unproven