If you play the video below, it will stop playing at about 12 seconds in to the video, and you'll see some text appear below the video.
You can use that text as a call to action, like asking the viewer to first sign-up for a free or paid membership, or to your free newsletter, etc before they can watch the full video.
And if you wish to display any kind of message right within the video player itself, S3MediaVault can do that too: Check out the In-Video Ads Feature which can be used on your own videos as well as on YouTube videos.
