I applied online, and was lucky enough to skip the video interview and jumped straight into an on-site interview. The onsite interview was broken down into two parts focusing on your personality/career questions, and then a case study. Following that I was flown up to the main Deloitte office in my country to attend an assessment center. The assessment center was very competitive and prestigious. Be very smart about what you say and when - there are Deloitte partners who are jotting notes about you the entire day. Overall, just you be yourself and don't psych yourself out. Take it step by step, and demonstrate that you can work in a team. Be prepare to present.