Went through this earlier this year for a mid-level Brand Manager opening in the home care division. Seven weeks total from application to offer.
The HireVue screen was three video questions plus a few written ones. They ask things like "when do you feel most energized at work?" rather than "tell me about a time you led a project." The difference sounds subtle but prep is genuinely different. I went in with STAR stories and had to pivot on the fly. Do the strengths prep.
Assessment centre was a half-day virtual. Group exercise was a business case with four strangers, which was awkward over video but manageable. I noticed they were watching who facilitates vs. who dominates vs. who synthesizes. Being the one who pulled together the group's scattered ideas seemed to land well.
Final panel had two senior brand folks and an HR BP. They asked about my take on a category trend I hadn't expected. I gave an honest "here's what I know and here's what I'd want to learn" answer and it went over fine. Don't overclaim expertise you don't have, they can tell.
Offer was about what I expected for the level. Nothing blown-away remarkable but competitive for FMCG. The role itself is legitimately interesting if you care about brand strategy at scale.