Yo! This looks good Yo! :P
I like the smear frame of the yo-yo jumping up, and I'd say overall you have a nice smooth motion with the hand. The one thing that sticks out to me is the arm with the hand in the pocket. Right around the elbow joint the upper kind of jerks around a little bit. Since it's not being used and it's being held in place practically, the cloth of the shirt would be in a smoother motion going forward and back with the body; much like the other arm.
Nothing that couldn't be fixed easily enough though, so keep at it and you'll keep improving. :)