User blog comment:PlantyThePottedPlant/Random Topic Blogging II: Electric Blogaloo/@comment-1659929-20120210220929/@comment-1659929-20120211015142

Video masking is were you remove the background from an object and replace it with a Green-screen like background.

Example- you want the animation of Phineas. But you dont want the background. You either remove the background using special software or look on YouTube/ect. Once you got the animation with the background replaced with green you (note: this is me using my software) put a video you want phineas to be in front, then on a new "layer" you put the animation of Phineas (still with the green backing) you go to effects and go "Croma key". It then will remove the green background and your result is Phineas on your selected background.

This is how it looks with a green background:



How a finished looks:

Warning BaltoXDixie