Web series and playlists can be managed (and started) on this page. All channels have a default Favorites playlist. On this page you will also find an explanation of the key differences between a web series and a playlist.
Pro tip: Generally speaking a web series has the highest priority in the up-next playback sequence; second to only a playlist parameter in the URL. Example: http://www.funnyordie.com/videos/fd1b1c483f/louis-ck-and-a-child-from-ilikestuff?playlist=150063
To find out how to start a new web series or playlist, go here.