使用api通过php将视频上传到youtube

     $httpClient = 
     Zend_Gdata_ClientLogin::getHttpClient(
     $username = '****@gmail.com',
     $password = '*****',
     $service = 'youtube',
     $client = null,
     $source = 'testphp', 
     $loginToken = null,
     $loginCaptcha = null,
     $authenticationURL);

I have got the above code from code.google.com. I want to know what authenticationURL should be. I new to this help me out

If you copied your code from here, then you missed this line:

$authenticationURL= 'https://www.google.com/accounts/ClientLogin';

That's what it is.