http://creators.facebookwkhpilnemxj7asaniu7vnjjbiltxjqhye3mhbshg7kx5tfyd.onion/6-tools-you-should-know-video
If you schedule or save your video as a draft, you’ll be able to review its Smart Preview and adjust or discard it before your video is set to publish. If you want to publish your video immediately, the Smart Preview will generate and be inserted at the beginning of the video after publishing.