It’s super easy. Just click on the button located to the right-hand side of the video player. It’s right there with the “Favorite” and “Print” buttons. The ability to download videos is only available to Full Access subscribers.
TIP: In some cases where the browser plays the video instead of downloading it to your computer, simply go back to the "Download" button, right click and select "Save Link As....". This will initiate the download.