您可以在服务器中保存刷新令牌，并从那里请求新的访问令牌.

You can save a refresh token in your server and request new access tokens from there going forward.

否则，仅当您有权访问Content ID API时，才可以使用服务帐户和onBehalfofContentOwner参数.

Otherwise, only if you have access to Content ID API, you can use service accounts and onBehalfofContentOwner parameter instead.