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No videos to be found - https://www.googleapis.com/youtube/v3/search?key=AIzaSyAUtPMox6-3i6ZCm1ZrOvj6zoSP39GbFfk&channelId=UCgOs_JF4ZLpjhA7p1sjcsUg&part=snippet&type=video&maxResults=50&order=date
Gallery sample_wall does not seem to have any videos.