问使用YouTube数据API (v3)通过API键更新视频，得到401错误

EN

{
  "error": {
    "code": 401,
    "message": "Request is missing required authentication credential. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.",
    "errors": [
      {
        "message": "Login Required.",
        "domain": "global",
        "reason": "required",
        "location": "Authorization",
        "locationType": "header"
      }
    ],
    "status": "UNAUTHENTICATED"
  }
}

/**
 * Sample Java code for youtube.videos.update
 * See instructions for running these code samples locally:
 * https://developers.google.com/explorer-help/guides/code_samples#java
 */

import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.googleapis.json.GoogleJsonResponseException;
import com.google.api.client.http.javanet.NetHttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;

import com.google.api.services.youtube.YouTube;
import com.google.api.services.youtube.model.Video;
import com.google.api.services.youtube.model.VideoLocalization;
import com.google.api.services.youtube.model.VideoSnippet;
import com.google.api.services.youtube.model.VideoStatus;

import java.io.IOException;
import java.security.GeneralSecurityException;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;

public class ApiExample {
    // You need to set this value for your code to compile.
    // For example: ... DEVELOPER_KEY = "YOUR ACTUAL KEY";
    private static final String DEVELOPER_KEY = "...";

    private static final String APPLICATION_NAME = "API code samples";
    private static final JsonFactory JSON_FACTORY = JacksonFactory.getDefaultInstance();

    /**
     * Build and return an authorized API client service.
     *
     * @return an authorized API client service
     * @throws GeneralSecurityException, IOException
     */
    public static YouTube getService() throws GeneralSecurityException, IOException {
        final NetHttpTransport httpTransport = GoogleNetHttpTransport.newTrustedTransport();
        return new YouTube.Builder(httpTransport, JSON_FACTORY, null)
            .setApplicationName(APPLICATION_NAME)
            .build();
    }

    /**
     * Call function to create API service object. Define and
     * execute API request. Print API response.
     *
     * @throws GeneralSecurityException, IOException, GoogleJsonResponseException
     */
    public static void main(String[] args)
        throws GeneralSecurityException, IOException, GoogleJsonResponseException {
        YouTube youtubeService = getService();
        
        // Define the Video object, which will be uploaded as the request body.
        Video video = new Video();
        
        // Add the id string property to the Video object.
        video.setId("9BByHcBGMP4");
        
        // Add the localizations object property to the Video object.
        HashMap<String, VideoLocalization> localizations = new HashMap<>();
        
        VideoLocalization esLocalization = new VideoLocalization();
        esLocalization.setDescription("Esta descripcion es en español.");
        esLocalization.setTitle("no hay nada a ver aqui");
        localizations.put("es", esLocalization);
        
        video.setLocalizations(localizations);
        
        // Add the snippet object property to the Video object.
        VideoSnippet snippet = new VideoSnippet();
        snippet.setCategoryId("22");
        snippet.setDefaultLanguage("en");
        snippet.setDescription("This description is in English.");
        String[] tags = {
            "new tags",
        };
        snippet.setTags(Arrays.asList(tags));
        snippet.setTitle("There is nothing to see here.");
        video.setSnippet(snippet);
        
        // Add the status object property to the Video object.
        VideoStatus status = new VideoStatus();
        status.setPrivacyStatus("private");
        video.setStatus(status);

        // Define and execute the API request
        YouTube.Videos.Update request = youtubeService.videos()
            .update("snippet,status,localizations", video);
        Video response = request.setKey(DEVELOPER_KEY).execute();
        System.out.println(response);
    }
}

<!doctype html>
<html lang="en">
 <head>
  <meta charset="UTF-8">
  <meta name="Generator" content="EditPlus®">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
  <title>Document</title>
 </head>
 <body>
  <script src="https://apis.google.com/js/api.js"></script>
<script>
  /**
   * Sample JavaScript code for youtube.videos.update
   * See instructions for running APIs Explorer code samples locally:
   * https://developers.google.com/explorer-help/guides/code_samples#javascript
   */

  function loadClient() {
    gapi.client.setApiKey("...");
    return gapi.client.load("https://www.googleapis.com/discovery/v1/apis/youtube/v3/rest")
        .then(function() { console.log("GAPI client loaded for API"); },
              function(err) { console.error("Error loading GAPI client for API", err); });
  }
  // Make sure the client is loaded before calling this method.
  function execute() {
    return gapi.client.youtube.videos.update({
      "part": [
        "snippet,status,localizations"
      ],
      "resource": {
        "id": "9BByHcBGMP4",
        "snippet": {
          "categoryId": "22",
          "defaultLanguage": "en",
          "description": "This description is in English.",
          "tags": [
            "new tags"
          ],
          "title": "There is nothing to see here."
        },
        "status": {
          "privacyStatus": "private"
        },
        "localizations": {
          "es": {
            "title": "no hay nada a ver aqui",
            "description": "Esta descripcion es en español."
          }
        }
      }
    })
        .then(function(response) {
                // Handle the results here (response.result has the parsed body).
                console.log("Response", response);
              },
              function(err) { console.error("Execute error", err); });
  }
  gapi.load("client");
</script>
<button onclick="loadClient()">load</button>
<button onclick="execute()">execute</button>

 </body>
</html>