Shoot yourself or a co-worker in front of the green screen, remove the background and replace it with VIDEO. Post it as an unlisted youtube video. Video must be at least 10-30 seconds long. Bonus points for story and creativity.
This tutorial may help: https://www.youtube.com/watch?v=uwnlAS…wnlASSHaEY[/url]
Stock Video clips can be found here: https://www.videvo.net/