The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
MovieAirLt is designed to Play your Movie, or Video files with ".mov", and ".mp4" format on your device or on Apple TV via "AirPlay" under the same WiFi as your device. Your old Videos can be seen on your device, or better seen on Big screen TV with the Optional Feature to Add for Send and Receive video files from MAC. For additional info, please visit http://web.mac.com/agole