A demo should work as a "hook" to draw observers in quickly.
Great films open with an intriguing or exciting setup to pique a viewer's interest so they'll want to stick around until the third act. A good demo works in much the same manner.
Think of your demo as an introduction to your work. By leading your website and demo DVD with a brief, stylized wedding segment you will give a wonderful first impression, so that a potential client will want to look further into your work. To achieve this every clip must count. Each shot has to have emotional impact, provide information or be beautiful. We prefer the collage approach (clips from many weddings) because it gives us a greater pool of excellent shots to pull from. Plus, the variety of brides and locations will make the piece more interesting. One of the benefits of this type of demo is that many types of shots - from any part of the wedding day - can be used; and they can be arraigned to best create a message regardless of chronological order.
It's vital to keep a demo succinct because time is of the essence. When a bride is visiting your web site or walking past your booth at a bridal faire you must get her attention immediately. You need to "wow" her quickly - again, so that she'll want to look further into your work. This type of demo is not about showing how great you can film and edit a ceremony; it's all about impact – fast.