Try changing the aspect ratio of the moving you are watching.
For the seperate backgrounds, you can just put two together in photoshop to make one 3360x1050 background that looks like two. It depends how you are dual-screening though. If you are using XP, you can right click desktop>properties>desktop>cuztomize desktop>web> select new and select the location of your second wallpaper, then drag it to the second monitor, then right click desktop>arrange>lock web items on desktop.