How to copy movie in DVD to iPhone 6s plus?

I mean I want to use my new purchased iphone 6s plus to playback my DVD disk movie whenever I like. I often on some business trips, you know, so boring with nothing to do.

Just use handbrake to rip or convert your dvd to your iphone 6s plus supported video format.Of course, Sothink dvd ripper programme also can do that. You can use both of them.