content: From the page "You can download it and deploy to your own servers or use it online for free." There's the price. The video tells you what it does.* What other things need to be demonstrated? Giving them your email only signs you up for the closed beta, not more information. And yes, the video could be fake. But it's actually easier to write stuff down that's fake than to create a video that's fake. *I'm not a fan of using a video as the primary means of communicating features but there is nothing wrong with doing so.