To preview a card before making it, click on the video you wish to preview. The next page will show you a full preview of the video without faces. You will be able to listen to the song, see the mouth movements on the characters' faces, and see the greeting at the end of the video. 

Once you have created a card, you will be able to view the video you created on the "share" and "add message" screen. This preview gives you a chance to make sure the faces are on the correct bodies and the mouths are moving the way you want them to. If something doesn't look right, hit the "back" button on your browser to re-cast the card. 

If you're having issues viewing the preview, click here.