Show HN: I built Feynman for YouTube – a sidebar AI tutor for students

[Bslou]

Hi HN, I’m a UCLA student and I built this extension for myself to make studying from YouTube videos more interactive:

On-video Q&A: Ask “What does this step mean?” or “Why is that formula used?” and get concise answers based on the video’s title & description.

Practice problems: Automatically generate quick exercises (with hints) tailored to the video’s content so you can learn by doing.

Clean math rendering: Full LaTeX support (inline or display) so equations look exactly as they should.

Zero friction: Just install the extension, open any /watch page, and the AI tutor appears in the sidebar—no extra tabs or uploads.

Auto-reset: Switch to a new video and the chat history and context reset automatically, so it always stays relevant.