The easiest way to open any file on a PC, including an M4V file, is to double-click that file and let the computer choose the program with which to open it. If it fails to open, the computer may not have a program that plays that type of file, so you have to download one.Continue Reading
Windows Media Player is a widely used program by Microsoft that downloads M4V files.
Windows Media Player is available from Microsoft as a free download. Visit the Microsoft website, and follow the instructions for installing the program on your computer.
Once installed, Windows Media Player should open the file once you click on it. If it doesn't, the default program for opening such files may need to be changed to Windows Media Player.