(1). Open iTunes on your computer by double clicking on the iTunes icon. (2). Click on "File > Add to Library."
(3). Browse for video files. Search folders where you might have stored videos-try "My Documents," "My Videos" or "My Received Files." (4). Select one or more files and click "OK" or "Open."
You can also drag-and-drop video files from a folder (navigate folders with the "My Computer" or Windows Explorer feature) to the open iTunes window.