I probably would update the html content either in the onFinish of the clip (possibly doing different things depending upon the clip's url) or in the onUnload event of the player.
I would not bother trying to update the href attribute of the container but try to update the clip:
See:
http://flowplayer.org/documentation/api/clip.html#update
I would not bother trying to update the href attribute of the container but try to update the clip:
player.getClip().update({url: "secondvideo.flv"});
See:
http://flowplayer.org/documentation/api/clip.html#update