Since Amazon.com no longer supports the Amazon Unbox application, as of 2015, watch previously downloaded movies by using the Windows Media Player software that comes pre-installed with Windows 7 and newer versions, or download it from the Downloads section on Microsoft.com. Select the desired movie from the Videos section in the Windows Media Player library, or use the Search tool to locate the movie, and play it automatically in Windows Media Player by clicking on it.
In Windows 7, start Windows Media Player by clicking on it in the All Programs section after pressing the Windows key. In Windows 8, move the mouse pointer to the lower right corner of the screen, move it up, click Search, type “Windows Media Player” in the search field, and click on it. To select the desired movie, access the Player Library, select the Videos option, drag the movie to the list pane on the right, and click on the Play button.
If you can’t find the desired video content in the Videos section, use the Search tool to look for the movie by typing its name in the search field. If prompted to uninstall Amazon Unbox via the Control Panel, select the Keep My Videos option in the confirmation dialog box to avoid deleting the previously downloaded video content during the uninstallation process.