iLounge has posted a suite of brand new videos comparing the video capabilities of the new iPhone 4 to those of the iPhone 3GS and Flip Ultra HD. A set of two 720p videos, filmed at the same time, show how the iPhone 4 camera directly compares against the Flip Ultra HD camera, a pocket-sized rival that Apple targeted last year with video camera updates to the iPod nano and iPhone 3GS. For the first time, iPhone 4 has the resolution to compete pixel…