How do I unlock iPhone without losing pictures/videos?

HELP! I was updating the latest operating system on my iphone4, but it got stuck in recovery mode. The screen shows an Itunes logo, a USB and an arrow from the USB to the Itunes logo. In Itunes, it says "iTunes has detected a phone in recovery mode. You must restore this phone before it can be used with iTunes." There is no error message or error number. I clicked on the "Restore" button, but it said it will erase everything by restoring the original factory settings. How do I fix this problem without losing all the pictures and videos I took with the phone? Nothing has been transferred to or from the phone except contacts. I only have two songs on the ipod portion of the phone, but would like to preserve them if possible. Please help me save my pictures and videos!

Message was edited by: Viceman010