How to transfer videos from my computer to my iphone? - 1

I searched everywhere but all that comes up is how to transfer to computer from iphone. This really frustrates me there isn't a simple way to do this I can't be the first who has wanted to do this?

Added (1). I see the option to add photos and movies when I plug in my phone to itunes but nothing shows in the files when I click to choose one.

Use Itools Easy To Use.

To transfer videos to iPhone from computer, I'm using TunesGo

http://www.iphone-to-mac.com/tunesgo-iphone-ipad-ipod-manager.php

I favor it as it can even move those videos that are incompatible with iPhone.