To get rid of a green screen in After Effects, go to "Animation Presets" and look for Keylight, then drag and drop it over the clip. Then go to the "Effects Controls" panel. Set the Screen Color to the colour of your background's screen (in this case, green) using the colour selection.
\The first step is to import your footage. To begin importing, click on New Composition From Footage:
Select and use the Keying Preset.
Begin by applying the Keylight Effect.
Cleaner Key Effect
Advanced Spill Suppressor
Create a backdrop.
Make these adjustments in Filter > Blur > Motion Blur. Make these adjustments in Filter > Pixelate > Mosaic. A mild pixelate effect will result. To make a screen reflection for the computer monitor, add a Gradient Fill adjustment.
The most important advantage is that it is easy to use. Once you have the foreground content, all you need to do is create a solid color layer and set it as the alpha channel of your footage. Then, you just need to do some masking and voila! You have an effect that looks like it was shot on location.
We will first need to remove the old screen and clean the area where we want to install the new one. Then, we will need to attach all the necessary hardware, which includes cables and brackets. We will also need to connect power and data cables and then finally, mount the new screen in place with screws or clips.