Here's an interesting trick that allows you to record photos and videos secretly without third-party apps or jailbreak

  The past days I have presented you with an application that will allow you to record photos secretly directly from your terminals, but now I have a simpler method for you that also works for video clips. All you have to do is open the iOS Camera application, swipe from top to bottom (sometimes it takes two) to access the Notifications Center of your terminals, then press the button Volume + to take a picture or start recording a video clip. The procedure works for each module as long as it is activated before opening the Notifications Center.

  The trick can be used at least on iDevices that have iOS 7 installed, all pictures and movies can be accessed through the Camera Roll immediately after recording. For to secretly record pictures and videos it is recommended to disable the sounds in iOS, otherwise the Camera application will issue a warning when recording a photo or a video clip.