I've decided that I might want to try a few videos so I fired up iMovie '09 on my mac. It has a built in camera that I intend to use. It is picking up video just fine but I can't hear anything in the video. It's not picking up sound. I went to system settings and the built-in mic is picking up sound. It's just not picking up when I try to make a video. Can anyone help out here? (I hope this is an appropriate spot for this inquiry. If not, please advise further.) Thanks!