If you've come across rr4---sn-gqn-ungs.googlevideo.com and wondered whether it's safe, here's what you need to know. This domain is a small piece of Google's vast video delivery network, used by services like YouTube to stream content efficiently. That strange string of letters and numbers is just a server identifier. It's not a store, not a personal site, and not designed to be visited directly — which is why you get a 404 error when you try.
For a piece of infrastructure, the security is what you'd expect from Google: valid encryption, modern protocols, and no history of malware or blacklisting. There's no contact page or privacy policy, but that's normal for a backend server that doesn't collect your data. If you've seen this domain in a browser's address bar, it's likely because a video or resource was loaded from it — that's harmless.
When assessing whether rr4---sn-gqn-ungs.googlevideo.com is a scam, the short answer is no. It's a legitimate part of Google's platform. There's no need to worry about safety or fraud with this server.