Privacy

You can watch every video without an account. Signing in is only for keeping your progress and quiz scores.

What we store when you sign in

• From Google or GitHub: your name, email address and profile picture, and an id for your account there. Nothing else, and never your password.
• Your learning: which episodes you marked as watched, the last episode you opened, and your quiz scores.
• A sign-in cookie: one cookie that keeps you signed in for 30 days. It isn't used for anything else.

What we don't do

No ads, no tracking cookies, and we never sell or share your data. Videos are embedded from YouTube in privacy-enhanced mode, and only load when you press play. YouTube's own privacy policy applies to playing them.

Where it's kept

On Cloudflare, which hosts this site and its database.

Deleting your data

Sign in, open My learning, and choose Delete my account. Everything above is deleted immediately.