A playlistItem resource identifies another resource, such as a video, that is included in a
playlist. In addition, the playlistItem resource contains details about the included resource
that pertain specifically to how that resource is used in that playlist.
YouTube uses playlists to identify special collections of videos for a channel, such as: -
uploaded videos - favorite videos - positively rated (liked) videos - watch history - watch
later To be more specific, these lists are associated with a channel, which is a collection of a
person, group, or company's videos, playlists, and other YouTube information.
You can retrieve the playlist IDs for each of these lists from the channel resource for a given
channel. You can then use the playlistItems.list method to retrieve any of those lists. You can
also add or remove items from those lists by calling the playlistItems.insert and
playlistItems.delete methods. For example, if a user gives a positive rating to a video, you
would insert that video into the liked videos playlist for that user's channel.
This is the Java data model class that specifies how to parse/serialize into the JSON that is
transmitted over HTTP when working with the YouTube Data API. For a detailed explanation see:
https://developers.google.com/api-client-library/java/google-http-java-client/json