One last step: allow the camera

Eyes On pauses your video when you look away and plays it when you look back. It needs your webcam for that. Chrome asks once, and remembers.

🔒 The camera is read on this computer only. Nothing is recorded, uploaded or sent anywhere. Eyes On makes no network requests at all. The camera is on only while a video is playing.

On a Mac, if nothing happens: System Settings → Privacy & Security → Camera → turn on Google Chrome, then restart Chrome.