I want to have someones head in my video using PiP, but I want to just have the head and not the whole rectangle shaped video. Is there some way I can cut out the head and use it? I'm using Sony Vegas Movie Studio Platnium 9.0. Thanks.
The other option (which you can do with Platinum) is to film the head in front of a green/blue screen and use chromakeying to remove the blue/green colour. There's loads of info on this - just search Crhamakey or Green SCreen.