I have written a small patch to be able to view vodcastas via VOD Plugin on a budget only system with xineliboutput plugin. Normally the VOD Plugin use mplayer to play the vodcastas. Not the plugin search for xineliboutput plugin if mplayer was not found.
You need xineliboutput > 1.0 Im not sure which types of streams the xinelib supports but the first tests work fine.