Hallowindow looks terrific blasted onto the side of the house. Those bouncing skele's are always a favorite :)
You embed the video bu copying the URL in the box that opens up when you select the Filmstrip icon in the dialog box.
You may want to explore the music genre called Epic Music. It's the songs used in movie trailers. They are heart-pounding and some can be just a bit scary enough for Halloween but not overly so. Here's a couple of examples: