This app is the only extension I know which makes YouTube videos playable at the speed you prefer. With this app, you can now watch your favorite YouTube videos at double speed, and even slow them down to half speed.

The video playback speed is set in a range from 0.7x to 4x (slowest/fastest) the app is an ideal extension for those who want to learn more about a particular subject, or for people who want to watch their lectures at a slow pace.

To enable slow-motion playback you need to have a stable Internet connection, even on Wi-Fi.