It wasn't one of those super long collabs, just the length of a good song, which seemed to work quite well with the animation. The variety of animation styles was also quite appealing, and despite the variety, all the submissions were of good quality. It was extra awesome when the parts would match the music.
My only real complaint would be that section without animation. I'm not sure whether it was intentional or not, but the music seems to glitch a bit during that scene (I don't have a real problem with the lack of animation). Furthermore, maybe a little biography on the artists would've been nice; perhaps a little cliche, but sometimes I like to read them.
Overall though, very nice collab, I enjoyed it!