title: Found nil in JSON YouTube API just for the videoId
body: <p>So I'm writing an app that uses the YouTube API:</p>
  
  <pre><code>func callAlamo(url: String) {
      Alamofire.request(url).responseJSON(completionHandler: {
          response in
          self.parseData(JSONData: response.data!)
      })
  }
  
   func parseData(JSONData: Data) {
      do {
          let readableJSON = try JSONSerialization.jsonObject(with: JSONData, options: .mutableContainers) as! [String: AnyObject]
          if let items = readableJSON["items"] {
              for i in 0..&lt;items.count {
                  // other code here
                  let item = items[i] as! [String: AnyObject]
                  let id = item["id"] as! [String: AnyObject]
                  let videoId = id["videoId"] as! String //here it founds nil
                  self.videoIds.append(videoId)
                  // other code here as well
              }
          }
          tableView.reloadData()
      } catch {
          print(error)
      }
  }
  </code></pre>
  
  <p>For other things like thumbnails, titles and descriptions it works very well, however here it founds nil. Yes, I know what nil is. I've studied the JSON response but can't figure out why it gives me the error.</p>
  
  <p>The JSON: <a href="https://pastebin.com/HXsqxLyv" rel="nofollow noreferrer">https://pastebin.com/HXsqxLyv</a></p>