We are presenting the 3D models entered for the Competition in various ways for the Awards Finale and our web site/online publicity. Note that some of those include models that are not part of the Competition.
You can create your own tour around any part of Google Earth as shown and explained here.
For a particular 3D model, you can use ShetchUp to add Scenes (viewpoints) to the SKP file. To check the animation you can use View / Animation / Run. You then use File / Export / Animation to generate a video in AVI format. The default settings use a low frame rate and image size, which is quick and compact to generate but lacks quality; increase to say 24fps and 1024px x 768px or more. To add a sound track you’ll need to convert the AVI to an audiovisual format such as WMF.
The Walk tool in SketchUp works differently, though still for a single model. In Perspective mode, you define a route as a series of points at ground level, plus a viewing height. SketchUp generates the walking tour through that sequence of viewing points.
The Look Around tool rotates your view around a fixed point. For it and the Walk tool, you could use video capture of the moving screen image to record a video (perhaps with audio).