Chroma Key is a choice for those who want to remove video background and replace it. But before starting recording remember these tips : Make sure the backround is lighted and not dark. Make sure to avoid wrinkles Everything same to the color of background will be removed so dont use green or blue clothes. Lets see what happens when the background is not lighted enought. Using Ultra Key in premiere causes shadows and if you remove those shadows the subject becames less accurate, I mean you cant see more details on the edges and you see like something is moving on the hairs. The exact same thing is when the background has wrinkles and those dark areas are very hard to remove, even if in After Effects. "But you can avoid these problems if you care a little bit by working with the background before the shoot"