This idea has been merged into another idea. To comment or vote on this idea, please visit GLD-I-146 "Ready" videos should be embeddable in Composer and publish when story does.
Much like you can add an unpublished photo to an Ellipsis file, you should be able to add an unpublished video to an Ellipsis file. If it is unpublished, Ellipsis should either ask if you want to publish the video, or it will just be published when the Ellipsis story is published.
I've merged this Idea with another one with the same request, so that it can be voted on and tracked from one place: "Ready" videos should be embeddable in Composer and publish when story does