YouTubeR error: YouTube server responce error.

{
  "error": {
    "code": 404,
    "message": "Channel not found.",
    "errors": [
      {
        "message": "Channel not found.",
        "domain": "youtube.playlist",
        "reason": "channelNotFound",
        "location": "channelId",
        "locationType": "parameter"
      }
    ]
  }
}