

Data for this metric is not available for dates before October 1, 2014. This metric returns an absolute number, meaning that if a user adds a video to a playlist, removes it, and then adds it again, the metric value reflects the video being added to a playlist twice. However, it does not count playlists that a video is automatically added to, such as a channel's uploads playlist or a user's watch history. The metric value does include the number of times that videos were added to default playlists like the "Watch Later" playlist. The videos could have been added to the video owner's playlist or to other channels' playlists. VideosAddedToPlaylists The number of times that videos were added to any YouTube playlists. However, in reports that use either the video dimension or the filter parameter to restrict the response to only include data for a particular video, this metric only includes users who unsubscribed from the specified video's watch page. In channel reports, this metric includes subscribers lost through any mechanism through which users can unsubcribe from a channel. Data for this metric is reported similarly to the subscribersGained metric. This is a core metric and is subject to the Deprecation Policy. SubscribersLost (core metric) The number of times that users unsubscribed from a channel.

However, in reports that use either the video dimension or the filter parameter to restrict the response to only include data for a particular video, the subscribersGained metric will only include statistics from the specified video's watch page. In channel reports, this metric includes subscribers gained from any of these places. Channels can gain or lose subscribers in several places, including the video watch page, the channel page, and the guide that appears on the YouTube home page. subscribersGained (core metric) The number of times that users subscribed to a channel. See the YouTube Help Center for more information. shares (core metric) The number of times that users shared a video through the Share button. dislikes (core metric) The number of times that users indicated that they disliked a video by giving it a negative rating. likes (core metric) The number of times that users indicated that they liked a video by giving it a positive rating. Comments (core metric) The number of times that users commented on a video.
