Green Screen in Clipchamp

1. Drag your background onto the lowest video track. Your background could be a video clip, photograph, or colour/gradient chosen from the Graphics menu.

2. Drag your green screen footage on top of the background.

3. Make your green screen footage is selected (it will have a purple border in the timeline).

Go to the Effects menu on the right hand side of the Clipchamp window.

Select the Green screen effect. 

4. The green background will be replaced by your chosen background image. If some areas of the green screen are still visible or if too much has been removed, use the Screen Threshold slider to increase or decrease the effect.