You will need to download the Quick Time Movie Player to play these movies.
If you have a Mac, simply double click on the file icon. If you do not have a Macintosh, and double-clicking does not work, then simply drag the slide show icon onto an OPENED window of your browser window, such as Microsoft Internet Explorer. Please wait for it to load, approximately 20 seconds for the larger file. If it "hiccups", just click on the REWIND button to get back to the beginning and then hit PLAY again.