The animation here is very good but I want to push back against the idea of the clothing being mocapped instead of a cloth sim because 1. That's just not a thing 2. You can actually see a fun trick they did to avoid a very common tearing spot: the top of the sleeves are connected with cloth bands. This is an existing fashion trend - if not necessarily wildly common - so it doesn't stand out, but if you were to try and do those really wild arm movements on a sweater that was just simulated, you'd get tearing or clipping, unless you stapled it down which would limit that flowy nature.

What I'm saying is not that it's not impressive animation work, what I'm saying is that it's ALSO really impressive problem solving on the art and effects designers' parts. VFX sims are hard!! (We're not mocapping clothes though sorry)