We are planning to upgrade to Facebook Ads API v4 on 2019-11-21. As part of the planning for this, we will be deprecating the following metric as it is no longer available in that API version:
- Video average percentage watched
This field has been moved to the deprecated category and will no longer return any values as of 2019-11-21. There is unfortunately no direct replacement for this field, so we ask that you please take steps to remove it from your reporting in preparation for the upgrade.