Paste any YouTube video and turn its transcript into an interactive vocabulary lesson. Click any word — get the definition instantly.
Try: youtube.com/watch?v=… or youtu.be/…
How it works
Paste a YouTube URL
Drop in any YouTube link — Cassiopedia fetches the full transcript automatically, no account needed.
Select your target language
Pick the language you're learning — Cassiopedia tailors transcripts, definitions, and flashcards to your chosen target.
Click any word to define it
Tap any word in the transcript to see its definition and pinyin in the sidebar panel instantly.
Build your flashcard deck
Save words with one click. Review your growing vocabulary collection on the Flashcards page.