"this movie requires quicktime which is not supported by this version of itunes"
I am trying http://support.apple.com/kb/TS3771 but getting message saying "To run iTunes in 64-bit mode, select the iTunes application in the Finder, choose the “Get Info” command in the File menu, and uncheck the “Open in 32-bit mode” checkbox ..."
MacBook Pro, OS X Mavericks (10.9.1)