data.frame
with 16 columns: video_id, rel_video_id, publishedAt, channelId, title, description,
thumbnails.default.url, thumbnails.default.width, thumbnails.default.height, thumbnails.medium.url,
thumbnails.medium.width, thumbnails.medium.height, thumbnails.high.url, thumbnails.high.width,
thumbnails.high.height, channelTitle, liveBroadcastContent