There are some options. Whether you show the video preview or a text link is based on the querystring parameter "f" which takes the value "vid" or "txt".
So, say i want to just show a text list of the latest (20 by default) videos - i put this in my html page:
Bon! But my dear Steven, i want to show only the last 5 posts - can you do THAT? Well, yes we can... as follows using the "c" querystring value:
Of course you can point at ANY username you wish by changing the "u" parameter. Additionally if you do NOT use the "u" parameter you can use the "t" parameter and add any text you wish to be matched as so:
Mon Deu! Can it tell me what I should say in my next video to make sure people watch???
Unfortunately I had to pull that feature at the last minute, but as a work around I suggest clicking the "I'm feeling lucky" Google button and just talking about the first page you come to.
You can see all of this in action at http://livz.org. Play away :)