[arata]

Relevant transcript from the first two minutes of the video:

> Since very early in the evolution of the web browser, most of the browsers we've used have had a few fundamental thing in common. There's a very tall toolbar at the top with a slot for the URL that's on it's own line. And the website stays inside this space, this portal to the web, the viewport. Of course, as users, we've trained ourselves to put all of our focus on the website that we're using, but for years, the browser itself has maintained a strong visual presence. No matter how a website is designed to look and feel, the browser interface framed that design and dominated it. What if we could get rid of that frame and extend the design of the website to every edge of the window? Well, that's what we've done in Safari 15. This year we've reimagined the browsing experience as we know it. We're putting all the focus on the web content. The new Safari blends the tab bar into each website by changing its background color. The entire interface is on one line, and things naturally appear when needed. This makes your content feel more expansive. Each web page or web app takes over, extending to all four edges of the window. The browser interface yields to the content.