/!\ The movie won't start until your browser will have downloaded enough data to launch the movie. The fact of watching a WHITE screen is normal before it has finished loading /!\ So :
Wait until it has finished loading and watch it (remind this is a loop)... If you use Internet Explorer, might push "F5" to (re)play the movie...
Or download it :
Select "download button", then right click and "save target as".
Just double click on the .swf file, then another double click on the blue line at the top of the Flash player window to enlarge it if you like : but take care of aliasing !