From what I see in your video, it seems you’re having issues with the orbiting around cursor feature which is turned on by default.
We’ve added orbiting around cursor relatively recently. Since it’s giving you trouble, I suggest you just turn the feature off
const controller = viewer.createExtension(CameraController);
controller.options = {
orbitAroundCursor: false,
showOrbitPoint: false
}
Orbiting around cursor properly works only when you’re dealing with meshes. Lines and points are not supported yet. I can’t tell what your scene consists of just by looking at it, but there are things resembling lines in there. So the easy solution is just to turn off the feature like I show above
Cheers