I tried it as well. It's not passing the video resize info at all (tried IE and FF) and like you said resizing the iframe just crops the video. I don't know why they would put a promotional tool up that doesn't work.
I wanted to use it before at regular size but found it kept getting stuck on a model who wasn't live and gave me an "end of show" or "in private" message rather than refreshing to a new live model
