Chroma Key Effect

I had to use the green screen to make it look like I was somewhere.
Firstly, I recorded myself doing something for a few seconds. Then I went to 'Google' and copied an image of 'Big Ben'. I then opened up 'Final Cut Pro' and 'Imported' the short video clip onto it, then 'Imported' the image of 'Big Ben' onto it.

After that, I clicked on 'Effects', 'Video Filters', 'Key', and 'Chroma Keyer'. I then dragged that onto my video clip. I clicked on the 'Chroma Keyer' tab then I clicked on the 'Eye Dropper' and clicked on the background image. I done that a few times until most of the green was gone. I also used the 'Softening' tool and the 'Edge Thin' tool to make it look more smoother and to take away most of the green around the edges.

Once that was done, I 'Rendered' everything and clicked on 'File', then 'Exported' it as a 'QuickTime' movie then to put it on 'Youtube'.