Ask HN: Tool for creating words-follow-vocals style presentation?

I'm looking to create a presentation that shows the words being spoken on screen, moving around to show various screenshots, videos, etc. Something like Cee Lo's "F You" video: http://bit.ly/9UXB6e (NSFW)

This is not for a music video; it's a product walk-through.

Can you recommend any tools for creating such a presentation?