A series playlist allows you to mark your playlist as an official set of videos that should be viewed together. Adding a video to a series playlist allows other videos in the playlist to be featured and recommended when someone is viewing a video in the series playlist. YouTube may use this information to modify how the videos are presented or discovered.

There are a few things to remember when using series playlists:

• You must have a verified account in order to use series playlists.
• A video cannot appear in more than one series playlist.
• Only videos uploaded by you and that you have the rights to can be added to a series playlist.

To enable a series playlists, visit playlist settings while on your computer and check the box “Set as official series for this playlist”.

* Nguồn: Youtube