Currently we do not have documentation on this feature, as it is new and in early development, but we are working on that. Trailblazer products will have limited resources at first so publishers can interact with them and give us feedback on how we can improve the product.
Right now the best supporting resource is a video walkthrough with clickable chapters that is attached to the main product card.
Currently we do not have plans to post the videos on Facebook and YouTube to drive traffic to site, but that may be something we try in the future, at which point there would be more information about it.