Ultra Key - Premiere Pro

1. Put the green screen clip on video track 2
2. Put the background clip on video track 1
3. Add Ultra Key' to the green screen clip
4. Select the green screen clip and go to Effect Controls'
5. Click the Eyedropper and hold the command key.
6. Click the color to key out with average lighting.
7. Set the Setting to Aggressive

1. Set output to Alpha Channel to view the mask.
2. Under Matte Generation adjust the Pedestal
3. Under Matte Cleanup adjust Choke and soften