Renaming the file extension from M4V to MP4 would be the easiest way to make M4V files available for use on its unfriendly devices and software. But what tools can we depend on for converting M4V to MP4? Check out our guide for more information.Ĥ Ways You can use for Converting M4V to MP4 But devices that can accept this type of file are very limited unless you convert it to a more common format like MP4, you’ll be allowed to use it without limitation, for example, watch it in your Android devices, or edit it in iMovie, Final Cut Pro etc. Files that have M4V file extension are very popular today with the increasing growth of Apple users.