无法在'DOMWindow'Youtube Data API上执行'postMessage'

Question

由于Google Youtube Data API有一个示例示例，我无法运行给定的代码，因为它会在控制台中抛出错误

Failed to execute 'postMessage' on 'DOMWindow': The target origin provided ('file://') does not match the recipient window's origin ('null').

我将我的脚本链接为

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js">
</script>
<script src="https://apis.google.com/js/client:plusone.js"></script>
<script src="cors_upload.js"></script>
<script src="auth.js"></script>
<script src="upload.js"></script>

我可能在哪里做错了？