How to make digital copies of DVD videos then play the copied files on iPhone?

I recently bought an iPhone 4S but I cannot handle this mobile phone well enough, now I am thinking how to make digital copies of current DVD videos to iPhone. I was curious then tried to copy the content directly when I charge my iPhone, but failed! I don't know anything that I can do about this, please help... show more I recently bought an iPhone 4S but I cannot handle this mobile phone well enough, now I am thinking how to make digital copies of current DVD videos to iPhone.
I was curious then tried to copy the content directly when I charge my iPhone, but failed! I don't know anything that I can do about this, please help...
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