How To Change Background Of Video

To change the video's form pure color to the other is very simple and widely used in video editing area, so let's do this:

1. Import your video by "File > Import", and drag it to the track 2 on timeline. Then import the your background video and drag it to track 1 on time line(we imported blue sky clip) .
   
   
   
   
   
   
   
2. Then we turn to effects area to type in "Chroma" and we find "Chroma key", drag it to the video on track 2.
   
   
   
   
3. Next, we turn to the Effect controls tab, click on the button to select the white part of your video clip in the monitor.
   
   
   
   
4. After we have selected the white color, modify the other values like this picture shows:
   
   
   
   See the detailed information aboout the values
   
   
5. Then, the white part of your video clip has been instead of the blue sky.