Here's an under-reported feature of iOS 7: you can finally zoom in while video recording now. It seems like it could get a little choppy, as you have to pinch to zoom while already recording video but from the looks of the video above shot by 9to5Mac, the results are pretty seamless.
On top of zooming in, iDownloadBlog also found another neat camera-related feature in iOS 7 too. While recording a video, you can tap the white circle on the left hand corner in the camera app to take a still. The still (which actually is just a frame from the HD video) is saved to the Camera Roll while your video is still being recorded. [iDownloadBlog, 9to5Mac]