The interview is in multiple stages.
First, there's a culture and fit test. It's an online quiz-like thing that has you selecting what you're most likely to do in a situation, or what you agree or disagree with, etc over multiple questions. This took me about 15 minutes, but they say to give yourself up to half an hour.
Second, there's a pre-recorded video interview. The setup on the site was easy, but it might be tricky if you don't have a laptop or desktop computer. You get two attempts at each question, with the last attempt being the one that saves. The length of your answer is limited (I think it was two minutes) but you can take as much time to prepare between questions and individual attempts as you need. It doesn't automatically start like some interviews - you have to press the button to start and stop the recording. If you make a mistake on the last recording for a question (I did!) you can't fix it, so be prepared!
Third, you've got the in-person interview. Mine was with the bank manager only. The questions were a mix of standard interview and "what would you do in this situation" scenario type questions, and the interview itself was not very long.
After about a week, they called to inform me I wasn't successful. I received useful feedback on my interview, including feedback on specific answers I gave and where I could improve and how. This was very lovely!
I will note that the position explanation I received at the interview was not what I expected. The role was advertised as a Teller role. There was no indication that I would need to generate a certain number of referrals for other bank services each month, but this wasn't a huge surprise. What was a surprise was being told I may need to cold call customers to generate these referrals.