When an event occurs the playlist listener is called first and after that the
common clip listener is called. This is called "event bubbling" - a term that
is mostly used in HTML/DOM programming.
This demo is a bit advanced but you should respect this if you are extending
Flowplayer functionality with scripting.
You can see an onStart listener bind both to the common clip and to a
playlist entry. You can cancel the bubbling so that the common clip event is
not called by returning false from the playlist event listener. This kind of
design pattern is also used in DOM programming.