To use the green screen I took the original footage and audio from Adele's 'Rolling in the Deep' and some footage of Ellie singing to the same song in front of a green screen.
Making sure the green screen layer is on top I applied the 'Eight-point Garbage Matte' to trim the size off the edges of the video to just leave a minimal amount of green screen.
After syncing the audio from the music video and the lip syncing from Ellie I applied the 'Ultra Key' filter and set the key colour to green to get rid of the remaining green screen, which can be seen in the second image.
The finished result can be watched above.
