Step 1 – Insert background picture into I-Movie.
Step 2 – I-Movie defaults to Ken Burns effect – set your start and end by highlighting the background photo – click enhance – click the cropping tool. You can set the start and end to be at the same point by dragging.
Step 3 – Import video into I-Movie – bring video into timeline and drop on top of the background picture
Step 4 – Highlight the video by clicking on it. Click on the ‘video overlay setting’ (2 squares that overlap) click the drop down arrow next to the word ‘cutaway’ and choose blue/green screen.
Finished – Your photo will be the backdrop to your video.