The latest video made by the Caring For Marriage folks (caringformarriage.org) is up on YouTube. Like the 3 other Caring For Marriage videos (this one, this one, and this one) it has a simple metaphor and a simple message about marriage. If you don't get distracted by the low quality video and the other flaws you could find, there's a good point in each of them. I think it's useful to have these sorts of easily understandable metaphors for explaining simple truths about marriage.
Incidentally, on the Caring For Marriage web site you can find information about and register for the Caring For Marriage conference coming up on February 14th and 15th.
UPDATE: I've now embedded the videos in this post so you can watch them right here.