http://creators.facebookwkhpilnemxj7asaniu7vnjjbiltxjqhye3mhbshg7kx5tfyd.onion/10-video-best-practices
When the test ends, the winning post is automatically published on your Page and distributed to your full audience. You also get to choose the metric that’ll determine the “winner” such as 1-minute views, comments, shares, reactions, people reached and link clicks.