YouTubeR Error: YouTube server responce error

{
  "error": {
    "code": 403,
    "message": "Requests from referer http://www.pilipufgrist.com/ are blocked.",
    "errors": [
      {
        "message": "Requests from referer http://www.pilipufgrist.com/ are blocked.",
        "domain": "global",
        "reason": "forbidden"
      }
    ],
    "status": "PERMISSION_DENIED"
  }
}