The domain r1---sn-q4flrnee.googlevideo.com is a subdomain of googlevideo.com, which is owned and operated by Google. It's part of the infrastructure used to deliver video content for services like YouTube. When you visit it directly, you get a 404 error page — that's normal for backend servers that aren't meant to be accessed by browsers.
For a site like this, you wouldn't expect an about page, a privacy policy, or contact details. What matters is the security and ownership, and both are strong: the connection is encrypted with modern standards, and the domain lives on Google's own network. The few warnings — like accepting older encryption or blocking search crawlers — are minor and typical for this kind of endpoint.
Is r1---sn-q4flrnee.googlevideo.com a scam? No. It's a legitimate piece of Google's video delivery system. You don't need to treat it like a website you'd buy from or log into. It's just infrastructure doing its job.