I think it's very easy to miss that there's a video in your homepage. The first thing I saw was the green "Try PitchIt now", I had to go back to search for the video.

I think it's because it's the same colour and roughly the same size as the surrounding text so it looks like some kind of a logo. Maybe you should display the video player to make it more obvious?

See for instance, straight from the frontpage at the moment: https://www.useslate.com/

You can't miss the video that way, and I know what will happen when I click the "play" button (I won't be taken to an other page for instance). In your case the video puts itself on top of the rest of the page, meaning I can't listen to it while I idly browse the rest of the content.

As for the actual "hands on" demo the first thing I see is a prompt for me to input an email address. I immediately closed the tab. You want 0 friction here IMHO, use fake addresses to give the potential user a taste of the application. Then maybe at the end prompt for more info.