INVALID_FIELD_NAME_FOR_REPORT when requesting AdGroupName from the Video performance report

In the documentation (https://developers.google.com/adwords/api/docs/appendix/reports/video-performance-report#adgroupname), AdGroupName is said to be a valid attribute to request from the Video performance report.

The following query however returns an INVALID_FIELD_NAME_FOR_REPORT when requesting AdGroupName:

SELECT+VideoId,VideoTitle,CampaignName,AdGroupName,VideoViews,Clicks,Cost,Conversions,VideoQuartile100Rate,VideoQuartile75Rate,VideoQuartile50Rate,VideoQuartile25Rate+FROM+VIDEO_PERFORMANCE_REPORT+DURING+20151001,20151031

The error that's returned:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
 <reportDownloadError>
   <ApiError>
     <type>ReportDefinitionError.INVALID_FIELD_NAME_FOR_REPORT</type>
     <trigger></trigger>
     <fieldPath>AdGroupName</fieldPath>
   </ApiError>
 </reportDownloadError>

Any help would be greatly appreciated!

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