When publishing a collection, you may want to include a trailer to encourage potential customers to subscribe or purchase the collection. For collections with trailers, the watch trailer button will appear for all potential customers as well as signed in customers and subscribers.
Navigate to the collection you want to add a trailer for under Content > Collections and click Edit. Under the Appearance tab click Choose Video in the Trailer Video section.
The Watch Trailer button will appear on the video page under the video player.