For this class homework we had to green screen out the video given to us and add the background to it. I used the technique of the IBKColour and IBKGizmo node. First I created the IBKColour and tried to make it as an matched up green screen plate then I added the IBK Gizmo to get the green screen part separate and get the right alpha for the scene. I color graded the plate to match it a little bit more with the chosen background.
At the top of the screen there is a microphone that sometimes pops up in the screen, I removed this microphone using a simple Rotoscope and stencil this over the scene there the green screen is already removed. I did not have to do many extra things to the Rotoscope since it is a small area that the microphone pops up in.
Lastely I merged the foreground and background together and gave the background a little bit of an defocus to make the foreground image stand out more and give it a bit more realism.