Hello!
I faced an issue while using SearchGoogleAdsRequest. Sometimes when I request the managed_placement_view table, I see that some of the rows has an empty value in 'ad_group_criterion.youtube_video.video_id' field. I wonder why it's empty. I tried to find any reasons, why this field value may come as empty string, when in the other rows it is, but found nothing.
So, for me that is a problem, because almost the half of the rows come with empty value in this field.
There are any reasons why it happens?