Faceover

Evening folks ..

You know those videos where theres something happening and some bugger puts like.. the presidents..or the Queens .. face over someone else's face/head and their face stays over theirs for the duration ....???

What am asking is what is that software that does that...

have a nice evening ..

I know its old but this is what I mean ..
http://youtu.be/5N-Wo27b1js

after effects

Use any After Effects later than CS3, because they came bundled with Mocha.

CS3 and earlier will work, its just called "tracking", do a search on "After Effects Tracking".