You can create a full-screen video call on your own domain by adding a specific script to your webpage before the closing body tag, which sets the video call to fill the browser window and uses a custom URL for the meeting link. This allows you to brand your user's experience, improve SEO, and create richer experiences on your site. By using this method, you can share your own website link with others to join the video call, rather than relying on a Daily.co room link. Additionally, ensuring that your webpage uses a secure protocol is necessary for meeting links, as it poses a security risk if not used.