I don’t know why there would be lateral movement across the surface just before touchdown. But at a guess, maybe the landing radar/camera detected rocks and it was manuevering away? Or maybe residual momentum from the de-orbit? Or maybe if they use thrusters for maneuvering for the landing, there will always be some drift?
Personally, I think it appears a bit tall for its base. That must make setting it down more difficult. ...Though Space X has mastered that problem with their Falcon rockets.
I thought the same thing about base vs the height. I wonder if they did dynamic analysis with moon gravity. I assume it was. I did have hope that it would go well. Maybe next time.