Movian

Hello plugin developers !
I have a question regarding the plugin JS API : how can I request an url before playing a video ?

Look at this snippet taken from tou.tv plugin :

plugin.addURI(PLUGIN_PREFIX+"emission:(.*):(.*)", function(page,emissionId,title) {
      page.type = "directory";
      page.metadata.title = title;
      var getEpisodesResponse = showtime.httpGet(EPISODES_URL + emissionId);
      var episodes = showtime.JSONDecode(getEpisodesResponse);

for each (var episode in episodes.d) {
        var getEpisodeResponse = showtime.httpGet(EPISODE_VALIDATION_URL + episode.PID + JSON_OUTPUT);
        var episodeMetadata = showtime.JSONDecode(getEpisodeResponse);
        var metadata = {
          //metatadata stuff
      };

page.appendItem(HLS_PREFIX+episodeMetadata.url, "video", metadata);
    }

in this code, I first got the list of episodes, and then for each episode, I get the url of the episode.
So when there is a list of 40 episodes, I make 1+ 40 http requests; even if the user just wants to play 1 episode.
That would be ok, but the episodeMetadata.url returned is only valid for 1 mn or 2; so I would like to get the episode metadata just when the user clicks on the video link.
Do I have to create a pass through page that would just get the metadata of the selected episode and then play the video ? how can I do that ? what would be the type of this pass through page ? directory ? item ? and from this how can I tell showtime to play the video ?

thanks for your answers, I hope I was clear enough !
Anthony