This guy is amazing. A listened to the whole thing while working on other tasks and at times forgot that I was listening to a soloist rather than a a group. I don't know how he's making all the different sounds at once.
After actually watching and listening at the same time I've concluded that there has to be another instrument in the room that is off camera.
He is using a looping machine for part of it. But it's still amazing I think.
I love cellos and basses. Some of my favorite all-time instruments.
Thanks for the comments.