How to sync all my cameras to record a video at the touch of a button?

I would like to use the built in camera on my macbook and the cameras on my ipod and iphone to record a video of me playing the guitar with each camera positioned to capture different angles. I would like to be able to start recording from all three cameras at the touch of a button.

I do not think that is possible. What you need to do is watch this Video - then after you watch it, I think you will figure out how to get the 3 Videos synced up. Have Fun.