Excellent animation
The entire time I was trying to figure out how you'd animated it, exactly. I know you can't use tweens to do some of the things done here but it was all so smooth and perfect I couldn't wrap my head around the idea that you did it entirely frame by frame. Very very well done.
I was iffy about the music at times, occasionally it seemed to fall out of sync with the animation. Then I realized it's an abstract track juxtaposed with abstract visuals, it's lucky there's any syncing at all, ha ha. Once I got in the right mindframe I could find no problems. To use your words, I especially appreciate the 'whipping' motions of the crane, in some spots it almost feels like the stabbing notes of the music are actually folding the paper themselves.
Not a fan of abstract art, but I can definitely appreciate the skill apparent here. Keep at it, good sir.