Since a separate playlist can be much wider than the default one, it is allowed to define a video description for the playlist's item, displayed later under the video title.
{sources: [{src: "//www.domain.com/media/playlist.m3u8",type: "application/x-mpegURL"}],title: 'video item title',description: "video item description",thumb: 'http://domain.com/video_thumb.jpg',duration: '03:40'}