2. Tap the screen where you want the camera to focus, once it's focused, tap the "lock" icon in the bottom right.
Note: The camera lock button will change the focus of your camera to a specific point that you select on the screen. If you tap on a lighter spot in your frame, the video will go darker. If you tap on a darker spot the video will go lighter. Try and tap as close to the image you want to focus on, to keep it in focus. When the camera lock is on, the lock button will turn green and it will maintain the focus while you record your TouchCast. Unlock the screen to change the focus again.