I am unable to get any data from the sample request at https://developers.google.com/youtube/analytics/sample-requests#channel-audience-retention-reports
What am I doing wrong - I am following the sample in the API Explorer https://developers.google.com/apis-explorer/#p/youtubeAnalytics/v1/youtubeAnalytics.reports.query?metrics=audienceWatchRatio%252CrelativeRetentionPerformance&dimensions=elapsedVideoTimeRatio&filters=video%253D%253DMY_VIDEO_ID%253BaudienceType%253D%253DORGANIC&start-date=2014-05-01&end-date=2014-06-30&&ids=channel%253D%253DMY_CHANNEL_ID, requesting on my channel and filtering on a specific video. I do get a succesful response, but it is essentially only the columnHeaders:
{"kind": "youtubeAnalytics#resultTable","columnHeaders": [ {"name": "elapsedVideoTimeRatio","columnType": "DIMENSION","dataType": "FLOAT" }, {"name": "audienceWatchRatio","columnType": "METRIC","dataType": "FLOAT" }, {"name": "relativeRetentionPerformance","columnType": "METRIC","dataType": "FLOAT" } ]}