Kelly, Gosh it sounds really great to me. What I do notice is your left hand seems tense and your wrist looks like it is a tad kinked. Now that could be the angle of the camera, but I am thinking your elbow is the issue. Try this with your elbow a tad more under the violin and not as close to your body. Let your arm hang loosely with your fingers on the fingerboard. You may find it better to stand while you play. Also playing with both feet on the ground as you sit, will help you get a more balanced posture which will increase fluidity. Again, I think you sound very good.
