Well if the video doesn't convince you a live demo won't either. Your best bet will be waiting for the open beta, which I remind you is very soon.
Of course a live demo would. A video with simple graphics can be made pretty easily. In your video for example you can't see the task bar or the time anywhere changing. Anyways I don't really care, I'll see in a few days when you release/don't actually release.
Unless you're an experienced video editor you can't say that. Take it from a guy who has experience with motion graphics (after effects).
Would you like me to make a video where I open up other programs as well?