Show HN: Study any YouTube video with a Duolingo-style, timestamp-citing quiz (fragen.co.uk)

This is a way to remember those insightful, but "thumbnail blurs in" videos and great lectures you find online nowadays.

I've been working on studying tech after an AI degree in 2019, and this is in part a culmination of that - Combining grounded, accurate flashcards with video.

This is a live product with some demo quizzes and a pro subscription to upload more videos. Would love to hear your thoughts. We're thinking about building in streaks, and more Anki style learning (for example bringing spaced repetition back to the fore)