This clip involved a piece of green paper within the photo frame so we could later on edit and place a clip within the photo frame. This was the editing process:
1) Place clip in the timeline (work area)
2) Cut out unwanted parts
3) Go to 'Video Effects' - 'Ultra Key' then drag it onto selected clip
4) Click on the clip which has the ultra key on it
5) Go to 'Effect Controls' - 'Ultra Key' - then click on the pipette symbol to then click on the green card within the frame. This makes all the green colour turn into other footage.