How to transfer videos from iphone to computer?

I have a group project in school where we have to make a video on green house gases. I have a Go Pro Hero 2 but i didn't feel like taking a 300 dollar video camera to school where it could easily be stolen. So instead i used my Iphone 4. I have a a least 29 videos (the longest video is 4 minutes). I need a very detailed step by step description of how to get the videos from my iphone 4 to my computer, and then into a format where i could edit and put all the videos together.

You get an iPhone charger cord and hook it up to your iPhone and computer.

Follow these steps
http://www.justtext.com/messageboards/20130202133028.html

You can have a try the iphone transfer, it will help you a lot