Yes, focus coil and he has it adjusted to such an extreme it is causing distortion in the upper left. It sure looks to me like the image is compress a bit on the left side and stretched on the right. If that was corrected, it would shift the center to the right.
I'd prefer to watch an image that was a bit off center but not distorted like you have it here. The corners of your programming are going to be cropped off anyway.
I'd also try a different signal source if possible. I think you are using a Leader LCG-400? It is entirely possibly that circle is not perfectly centered in the test pattern.
