Not that I know of.
Don't know if that is worth the trouble, most of the times the site implementations more or less speak for themselves, and the one or two questiions that remain get answered fairly quickly.
That combined with the fact that there aren't a lot of new devvers trying to implement new sites (don't think lack of documentation is the cause here) is probably the reason there's no documentation...
Maybe they do speak for them self, but then it would be good if they worked, so the devs could understand how it should work.
Right now I dont know what kind of url the webplayer want to start the "webbrowser" and play the vidoe from the web site.
I've tried to figure that out with help of other sites, but cant find any that works. Havent looked that hard more then tried to find any other site that use the interface/baseclass that I think I should use for the webplayer to work and all sites I've found that use the interface/baseclass doesn't work, so its hard to go on from here.
I use standalone player to test if the sites work, because I cant get the plugin to work with MP.
Anyone that have anything that can help me with this is welcome.