How to Remove DRM, Convert/Play iTunes movies on common m

I purchased some movies from iTunes, and I wanna transfer them to common portable devices like my HTC but failed. Why? Can someone please explain step by step how can I do? And my friend recommend me M4V Converter Plus. What do you think of this tool?

via iLounge Forums http://forums.ilounge.com/mac-pc-itunes-tools/278516-how-remove-drm-convert-play-itunes-movies-common-m.html