It is simpler than that. Have someone sit opposite you with a mirrored screen and the audio feed going onto his headphones. He can then write the answers that appear on your screen or get shown on another screen around your camera so that you dont look like you are looking away. Spend a bit of time to act about trying to think up a solution, and you have a winning combo. Have seen many people pass online video proctored certification exams using this trick ;-)