Second: know your audience. It's not surprising that a landing page for a video startup would benefit greatly from having an actual video present. It would be awesome to see a result set from a wide range of start-ups.
Third: The real-time video analytics are awesome. When looking at realtime can you rewind or scroll the realtime chart backwards in time?
Fourth: When visiting a new web site I tend to be brutal - if I don't "get" the site within the first 5-10 seconds I move on. If my interest is piqued in the first few seconds but I'm still not convinced I will jump to a video. I rarely go straight to the video (though I imagine if I looked at a dozen startup landing pages a day I would probably hit the video first). If my behavior is typical it seems that a video is the tipping point for users already primed by the rest of the page.