The first video is the original music, and the second video is each channel isolated.
I'm not so sure about the run in measure 16, if it needs to be changed for playability. I considered changing the low Ab on beat 2 to a D so that it's a bit easier, and it doesn't change the sound too much. Obviously the chromatic bit at the end of the measure is just an approximation, and I wasn't sure about how to handle it.