fix: Clarify YouTube API key(YouTube Data API v3 enable) requirement for live route

[dreaifekks]

Involved Issue / 该 PR 相关 Issue

Close #

Example for the Proposed Route(s) / 路由地址示例

NOROUTE

New RSS Route Checklist / 新 RSS 路由检查表

• New Route / 新的路由
  • Follows Script Standard / 跟随 路由规范
• Anti-bot or rate limit / 反爬/频率限制
  • If yes, do your code reflect this sign? / 如果有, 是否有对应的措施?
• Date and time / 日期和时间
  • Parsed / 可以解析
  • Correct time zone / 时区正确
• New package added / 添加了新的包
• Puppeteer

Note / 说明

Clarify YouTube API key(YouTube Data API v3 enable) requirement for live route in document.

[github-actions]

Successfully generated as following:

http://localhost:1200/youtube/live - Failed ❌

HTTPError: Response code 503 (Service Unavailable)

Error Message:<br/>NotFoundError:
Route: /youtube/live
Full Route: /youtube/live
Node Version: v24.13.0
Git Hash: 0ca994ac

[github-actions]

Successfully generated as following:

http://localhost:1200/youtube/live - Failed ❌

HTTPError: Response code 503 (Service Unavailable)

Error Message:<br/>NotFoundError:
Route: /youtube/live
Full Route: /youtube/live
Node Version: v24.13.0
Git Hash: 44178364

[github-actions]

Successfully generated as following:

http://localhost:1200/youtube/live - Failed ❌

HTTPError: Response code 503 (Service Unavailable)

Error Message:<br/>NotFoundError:
Route: /youtube/live
Full Route: /youtube/live
Node Version: v24.13.0
Git Hash: b8c94ea3

[github-actions]

Successfully generated as following:

http://localhost:1200/youtube/live/@weathernews - Failed ❌

HTTPError: Response code 503 (Service Unavailable)

Error Message:<br/>ConfigNotFoundError: YouTube RSS is disabled due to the lack of &lt;a href=&quot;https://docs.rsshub.app/deploy/config#route-specific-configurations&quot;&gt;relevant config&lt;/a&gt;
Route: /youtube/live/:username/:embed?
Full Route: /youtube/live/@weathernews
Node Version: v24.13.0
Git Hash: 2aa4511d

[dreaifekks]

can not use YOUTUBE_KEY for action?

[TonyRL]

I don't think people will use API key with YouTube analytics/reporting API. Regarding YouTube Data API v2, it was deprecated well before RSSHub exists.

[dreaifekks]

Yes, I updated the URL to https://console.cloud.google.com/apis/library/youtube.googleapis.com. This makes it easier for users to enable the YouTube Data API v3.

If the API is not enabled, the route fails as shown below.

Reason: This error occurs in /lib/routes/youtube/live.ts at line 64 because the data retrieved via utils.getLive (at line 58) returns null when the API is disabled.

After enabling the API, it works correctly: