Lesson 8.9: how to access service port by local proxy?

The last line of this course is:

If the service port has a name, the path will be http://localhost:8001/api/v1/namespaces/default/services/ghost:

I am not sure I take this sentence right, I think we can access the service by the URL. The service available in my environment is:

$ curl 127.0.0.1:8001/api/v1/namespaces/default/services/nginx
{
  "kind": "Service",
  "apiVersion": "v1",
  "metadata": {
    "name": "nginx",
    "namespace": "default",
    "selfLink": "/api/v1/namespaces/default/services/nginx",
    "uid": "ac5a561e-fddb-11e8-bae0-42010af0000b",
    "resourceVersion": "143707",
    "creationTimestamp": "2018-12-12T07:00:56Z",
    "labels": {
      "app": "nginx"
    }
  },
  "spec": {
    "ports": [
      {
        "name": "http",
        "protocol": "TCP",
        "port": 80,
        "targetPort": 80
      }
    ],
    "selector": {
      "app": "nginx"
    },
    "clusterIP": "10.109.208.49",
    "type": "ClusterIP",
    "sessionAffinity": "None"
  },
  "status": {
    "loadBalancer": {

    }
  }
}

But I cannot access it like it shown in this lesson material, the error code is 404. Is my thought about this right, or I missed something?

$  curl 127.0.0.1:8001/api/v1/namespaces/default/services/nginx:http
{
  "kind": "Status",
  "apiVersion": "v1",
  "metadata": {

  },
  "status": "Failure",
  "message": "services \"nginx:http\" not found",
  "reason": "NotFound",
  "details": {
    "name": "nginx:http",
    "kind": "services"
  },
  "code": 404
}