ITunes 12 not playing m4v files

Since updating to iTunes 12 none of my .m4v movies will play in iTunes. Movies that are .mp4 files play fine.
Anyone find a solution to this issue.

I am having the exact same issue after I upgraded my early 2013 15" Macbook Pro Retina to Yosemite. I am unable to play any of my iTunes purchased movies either from iCloud or locally from my computer. I receive the HDCP error. I have no external monitor connected nor am I using AirPlay or anything of that nature. I even tried manually switching graphics cards and can't get any of them to play.
I have a hunch that it has something to do with the Yosemite upgrade. Before I upgraded my OS, I did download and use iTunes 12 on Mavericks and had no issues playing my content. However right after the upgrade, I received the errors.

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    Message was edited by: williamson42

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