When registering for an event you can skip the video interview questions.
In order to go back, you must go to Events from the menu, and select the event you registered for and click "Event Info".
Screenshots explaining the process:
Locate Events from the menu on your left.
Then click Event Info after locating the event you registered to.
Then after clicking Event Info, a window will pop up with the events information and the option to "Record Video Interview" will be there.
Then after clicking "Record Video Interview" A box will pop up where you will have the option to start the interview. Then you can just record or upload videos.
Make sure to click "Submit Answer" at the end to submit your video interview.