title: YouTube report contains no data rows
body: <p>I have created a job with report type <code>channel_basic_a1</code> in the YouTube Reporting API. Over the night 2 reports were generated for this job. However when I download them, they only contain a header row and no data rows. Is this normal behaviour? Is it going to be updated with data when it's becoming available? How do I determine when I can download them again with data?</p>