Animating uv texture on instanced gltf object

Hi Folks,

thanks to all of you who had helped me gather much needed info on three js,
nearly completing the project ,

how do i animate uv on an instanced gltf object

instancedGeo = new THREE.InstancedMesh(child.geometry, child.material, 1);

want to access the instancedGeo.v and animate the v coordinates,

saw a post from mr doob somewhere on this topic but could not find the link to that topic,

and on the same topic, could i just use Mesh instead of instead of instancedMesh, because for this instance i have only one gltf geometry, would it make a difference in load time ? memory ?

thanks in advance