I am aware that the Dolly now exists, however, you cannot set the position and rotation of the handheld VRC camera in real time for unplanned routes. An example of this is a vehicle camera that is controlled by Udon that follows a vehicle with a custom method of looking somewhere based on linear and angular velocity.

https://x.com/uoppoH_VR/status/1813267859218571706 This is currently being done by using a Camera component and rendering that to a RenderTexture, which can then override the handheld camera when placing the camera inside the bounds of a camera override shader.