Hi again even if i'm answering to my own!!! ahahhaha
After a lot of test to try to figure out from this stupid problem, finally i found something.
I've reinstalled Snow leopard and i tried to go again into apple's web site to control if the movie works. and was ok.
next day, i went at work (i'm a computer programmer)and from here (where we have restriction about proxy connection) i tried again the video... message appeared : "Plug-in quicktime is locked". at that point, i refreshed the page and the same image(as above) appear with "?"...
when i saw that image,my expression was like--->
after that, i was watching(into the same apple's web site) other movies and those works.
i was very nervous and confuse until when i was looking into AMERICAN apple's web site, the same movie; and there works!
i've understand there was some kind of problem with operation system's cache (not browser cache).
i've cleaned it(with CleanMyMac) and everything works again also the first page (italian) with the "?".
If you have Quicktime.plugin into library folder, it's a problem about cache. clean it and u'll see everything will be ok again
Hi folks and sorry for my english