Use APKPure App
Get M4V to MP4 Converter old version APK for Android
Converti file video m4v in mp4
With this easy to use m4v to mp4 converter you just have to select your m4v file and click convert button. You will get converted mp4 file in no time based on length of your input m4v video file. M4V to MP4 Converter includes library that lists your all the conversions. You can play or remove files from library as you want. Happy converting :).