I just went in and this does NOT look like the video question in the application.
Welcome to the video interview for The Graduate School at Northwestern. Please read the following instructions closely before proceeding into the interview.
You will be asked to respond via webcam to a series of five video questions. You will have one minute to answer each question. Each page will contain one video question window and one video response window.
After the question is finished playing, your video response will automatically begin recording. The response will be automatically saved if the time runs out, or if you stop the recording. After all questions have been answered, you will see a completion message. At that point you should click the button that reads "Submit Interview".