This isn't a typical website you'd browse or buy from — rr4---sn-4g5ednkk.googlevideo.com is a Google subdomain used for delivering video content. If you see this domain in a URL bar, it's part of YouTube's or another Google service's backend. The 404 error you get when visiting it directly is expected; these subdomains aren't designed for human visitors.
For an infrastructure domain like this, the questions that matter are about security and ownership — and both are solid. It's hosted on Google's network, uses modern encryption, and hasn't been flagged by any security watchlists. There's no contact page or privacy policy, but that's because the domain itself doesn't interact with users.
If you're wondering 'is rr4---sn-4g5ednkk.googlevideo.com a scam' — the answer is no. It's a legitimate backend component of a major service. No need to treat it as a risky site.