You could use the dot product of (I think) the camera’s look vector RightVector and the Humanoid’s MoveDirection to get the direction (which can only be left or right) that the humanoid is moving towards relative to the camera, then use that to tilt the camera in it’s Z (roll) axis.
It’s kind of hard to explain here but here’s a somewhat related post on how you’d do that. I’ll see if I can pop a working demo in a bit