iTunes purchased files (usually in M4V format) are DRM protected, Leawo Converter and Blu-ray Player do not support that.
Please use Leawo Prof. DRM to convert the M4V file to common MP4 file then load it to Leawo Converter and Blu-ray Player.
Please use Leawo Prof. DRM for Mac if you are using MacOS before 10.13.
This FAQ is about: Blu-ray Creator, Blu-ray Creator for Mac, Blu-ray Player, Blu-ray Player for Mac, DVD Creator, DVD Creator for Mac, Frequently Asked Questions, Music Converter for Mac, Total Media Converter Ultimate, Total Media Converter Ultimate for Mac, Video Converter, Video Converter for Mac, Video Converter Pro, Video Converter Pro for Mac, Video Converter Ultimate, Video Converter Ultimate for Mac