Seems obvious but there has been patent litigation about it.
If you have a way to "play" something, then you'll want to have a list of things to play, too. A queue. A sequenced list. Items in a row.
We present FOUR PLAYLISTS to help keep things organized. The Main queue is a list of items ready be played. Favorites are clips previously saved and History are items already played. Trackers have new episodes of programs you subscribe to, or follow.
And then there are Playlists of PlaylistsTM
End of results: 2017-09-22 19:00:12 UTC