NoLinkedYouTubeAccount

After connecting your site to YouTube, some users have been receiving the following error:

Fatal error: Uncaught exception 'Zend_Gdata_App_HttpException' 
with message 'Expected response code 200, got 401 NoLinkedYouTubeAccount

NoLinkedYouTubeAccount

Error 401

This is because the Google account you connected has not been linked to YouTube yet. The simplest way to fix it is to simply create a YouTube channel for that account.

Here is some more info from Google.