Downloadable Google Videos

Some Google Videos can be downloaded for Mac. It also should work in
Windows, if an appropriate program such as iTunes for Windows is
installed. But it cannot be played.

If, however, I download it to my Linux system (Deb 4.1) it can there be
played (gstreamer-totem). If I then transfer it through the LAN
connection to the Windows (XP Home SP2) system, iTunes plays it. Does
anybody know the reason?

David