So what you do is use Audacity to record. I pipe Audition into audacity for better quality, so if you use that as well I can go over that later, anyways, click record with audacity to start your audio recording. Then make sure you set the same hotkey for all your video recording software, be it monitor capture or / and webcams / etc. Start recording the video, hold down push to talk, and hit something, like your desk, 3 times relatively quick, or slow, whatever, in a way that it would spike the mic. When you finish recording you now have a spot in all the audio tracks you can use to line up the tracks. Simple as that. And because the video recordings are on push to talk, you don't have multiple recordings of your actual mic.