M4V Player is a very easy to use video player. It can be associated with your M4V files so you just need to double click the file to play it. All basic functions like play, pause, seek, fullscreen are available.
You can also make your own playlists, save them, edit them. If you have a large number of M4V files, you can use built in search to find your favorite from the list. In all this is a great package for those who want to keep things simple. So what are you waiting for, download M4V Player and enjoy.