I checked it out, and I like the Dim lights feature too. I assume they are creating the media player using a xaml file and, indeed, I found a reference to one in the javascript file Player.js:
Code:var H=J.createFromXamlDownloader(G,"player.xaml");
However, I wasn't able to download the file directly, since I couldn't figure out which directory it is in. Maybe if you are persistent you can get it. If you do, just add it to the ~/skins/mediaplayer directory. Then update galleryserverpro.config to point to the new xaml file instead of the existing one (Professional.xaml for video and AudioGray.xaml for audio).
While you are at it, maybe you could include it here so others can use it, too. Good luck.
Roger Martin
Creator and Lead Developer of Gallery Server Pro