Went to the interview last year in LA! Basically, they give a presentation on the program for about an hour, then everyone is separated into groups of about 10 or so. They'll take 1 group at a time, (so if you're in a later group, like I was, you wait and sweat in the large meeting room for 2+ hours :,(... )
The actual interview process consists of a group section where you worked together with a group of 5 other people to answer a question they had laid out for you while 2 ppl from the admissions committee watched over. Seemed like they cared less about what we answered and more about how we interacted with the group.
The other half of the interview is the MMI format, so 5 min at 6 stations; you go in with 5 other people (from the group section) and rotate through stations. At each station, someone from admissions sits on one side and the applicant on the other. The way timing goes is that you get 1 min to sit quietly after rotating, at some stations, a minute to review materials, and then I think 2-3 minutes to talk to the person from admissions. Roughly put, there was some roleplaying, giving directions, drawing comparisons, personal opinion discussion, and clinical priorities.
Honestly, regarding tips, I would just practice thinking on your feet and remaining calm in fast paced situations, which are valuable skills in vet med regardless! Hard to prepare for something like that besides directly practicing at MMI style practice sessions, which I know some places do offer.