DVDFab DRM Removal for apple can exactly help. It can remove the DRM encryptions from your legally purchased content, producing the DRM-free music, videos, movies and audiobooks that play back flawlessly on popular music and video playback devices, such as portable music players, smart phones and tablets, etc.
Here is a tip on how to remove DRM from iTunes：
http://www.dvdfab.cn/tips/how-to-rem...nes-videos.htm