Hi Yimbo!
That's very exciting, congrats on being preselected. I also received a message for a HireVue interview (NATO HQ). Don't really know what to expect but from what I read previously on this forum and what I've heard from people who've been there before, the questions are pretty basic and straightforward. I'd recommend to also prepare a few STAR-type answers for competency-based questions just in case. Please let me know how it was after you record yourself! I will also share my questions here after I do too
Good luck!