The lesson
Announce a product on camera from a desk, and keep the sign-up page itself on screen so the viewer sees where to go.
A man in a black Rewind shirt speaks to camera before a window and framed photos, at one point pointing at himself. Another part shows rewind.ai/pendant in a browser: a pendant on a black cord, "Introducing Rewind Pendant", an email field with "Get Priority Access", and a line saying it transcribes, encrypts and stores locally on your phone.
The low production value only works if the person speaking is the founder. Keep the page on screen with the form visible, and put the privacy description within reading distance of the button.