You can also use the 'breadcrumbs' file from a GPS device (such as Skydemon) to create a simulated flight of your track using Google Earth, and add your own commentary. The file needs to be converted to the correct format, but the instructions on how to do this are available on-line. Here is an example of a flight I made last year in Portugal and Spain, to show some friends who have Apartments on the same complex as me.
www.rjdawson.co.uk/esuri.kmz