You have the option to play your lectures at different speeds (.5x, 1x, 1.25x, 1.5x or 2x).
To change the speed of a particular lecture video, go to that lecture, and drag your mouse over the video. You will see a button in the bottom-left corner of the video giving you the option to change the speed.
To change the speed of a particular lecture video, go to that lecture, and drag your mouse over the video. You will see a button in the bottom-left corner of the video giving you the option to change the speed.