If you find that iTunes purchased and rented videos can't be played on your Samsung or other devices, M4V Converter Plus for Mac can help you solve the problem at ease.
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M4V Converter for Mac
> Remove DRM from iTunes M4V movie Rentals & Purchases
> Convert iTunes M4V to plain MP4, MOV, FLV, AVI, MPEG, etc
> Unlock M4V to Phones & Tablets from Android, Windows Phone, Apple, etc