Recently, I’ve started to use Skype on my iMac for video calls. I’ve noticed that the built-in webcam’s video quality is very poor - dark and grainy. It’s almost like a very low resolution VGA camera. I’ve checked the video in the Photo Booth app and it’s just as poor. Is it supposed to be like this? Or is it being downgraded because I’m not using FaceTime? I’ve come from a Mac mini with a Logitech C922 full HD webcam which had excellent full-HD and stereo audio.