This smart converter provides a video editor that allows you to customize the original video. Optional Edit the M4V video before conversion
You can directly imput the targe videos there. Note: If the M4V videos are on your iPhone or iPad, just connect the device to the computer by an USB cable, and click the drop-down option at Add Files to select your device. You can add multiple files since batch conversion is supported. Or clicking the Add Files button to add M4V files. To import M4V videos, you can directly drag them to the program interface.
How to Convert M4V to MP4 in A Few Clicks