Language learning, reimagined

Watch. Understand.
Actually remember.

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/…

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YouTube transcripts
🔍
Click-to-define
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Chinese & English
🃏
Flashcard builder

See it in action

cassiopedia.app/video/dQw4w9WgXcQ
0:04大家好，欢迎来到今天的课
0:12今天我们要学习一些新词汇
0:20首先，让我们看看这个句子
0:28这很重要，请认真听
0:35你们都准备好了吗？
0:42让我们开始练习吧
0:50非常感谢大家的参与
Definition
学习
xué xí
verb
To study; to learn. The process of acquiring knowledge or skill through study, experience, or being taught.

How it works

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1

Paste a YouTube URL

Drop in any YouTube link — Cassiopedia fetches the full transcript automatically, no account needed.

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2

Click any word to define it

Tap any word in the transcript to see its definition and pinyin in the sidebar panel instantly.

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3

Build your flashcard deck

Save words with one click. Review your growing vocabulary collection on the Flashcards page.