The first video in the series is Ventilator V2, which was posted some time ago on the website & on YouTube. You may view the original video & more information here.

Please follow this link to view the quiz:
https://ed.ted.com/on/RyhGsz57

You may now complete a quiz to test your knowledge instead of or as well as watching the entire video. Each wrong answer will optionally link you to the relevant part of the video.