On November 15, 2019, AdWords API, Google Ads API, and Google Ads scripts will start returning null ID criteria for YouTube channels and videos that have been deleted, due to changes in our data retention policy. The criteria itself remains for a given ad group, but referencing the video ID or channel ID for that criteria will return null.

• In the AdWords API v201809, null values are returned as two dashes (–) in reporting.
• In the Google Ads API, NULL values are returned as NULL values.
• In Google Ads Scripts, null values are returned as null JavaScript values.

Please update your code where it uses these fields:

AdWords API	Google Ads API	Google Ads Scripts
YouTubeVideo.videoId	YouTubeVideoInfo.video_id	YouTubeVideo.getVideoId()
YouTubeChannel.channelId	YouTubeChannelInfo.channel_id	VideoYouTubeVideo.getVideoId()
Criteria in CAMPAIGN_CRITERIA_REPORT		Media.getYouTubeVideoId()
Criteria in CRITERIA_PERFORMANCE_REPORT
Criteria in SHARED_SET_CRITERIA_REPORT

If you have any questions while updating your code, please reach out to us on our forum.
Nadine Sundquist, Google Ads API Team