Students may want higher or lower video quality, for various reasons, for example if the internet connection is weak, it may be faster to load videos on a lower quality. See below a video tutorial of how to do this, or keep scrolling for written instructions.
Video Tutorial
Written Instructions
Hold your mouse arrow over the video and you will see a control bar appear across the bottom of the video. Near the right hand side is an icon that looks like a gear. Shown here: 
Click on this icon and a pop-up window will appear that allows you to select the desired quality. If you select “Auto”, the video quality will be automatically optimized for you. Otherwise, you can manually select a desired quality.