Playlists are grouping of media.
For example, if you want to have two static images and a video play at 9:00am as part of your morning announcements, you would create a new playlist and add those three pieces of media to this playlist, which you would name "Morning Announcements".
To set up a playlist
Click on the New Playlist button.
From here you will see three headings:
To edit a playlist
Click on the Edit button next the corresponding playlist on the Playlist main page. From here you can remove media and add media.
To delete a playlist
Click on the delete button next to the corresponding playlist on the Playlist main page. This will delete the playlist but not the media part that is part of the playlist.