When you use your computer to video chat with others, you may encounter awkward situations where the camera doesn't work, isn't clear enough, can't adjust its angle, or even doesn't have a camera. In such cases, you can connect and use your phone's camera for video calls via some software. Even with an old phone, its clarity is far better than almost any built-in or external HD camera. Better yet, you can also adjust its position and viewing angle at will.