How to not flop prerecorded interviews

I’ve progressed to the second stage of recruitment for BAE’s aerospace engineering apprenticeship and they’ve said I have to prerecord my answers but that I’ll be given time to read and prepare for each question which means I’m guessing it’s timed?

How do I not flop this? I’ve never had any practical interview experience before. Also what about the game based assessments how do they usually work? There’s little information on them I’ve been able to find