If you've come across rr5---sn-oguesnd7.googlevideo.com and wondered whether it's safe, here's the short answer: yes, it's a legitimate part of Google's infrastructure. This domain is a subdomain of googlevideo.com, which is the backbone Google uses to serve YouTube videos and other streaming content. The 404 page you see is just a default response when you hit the root of a server that isn't designed to host a website — it's not a sign of a scam or a broken site.
For comparison, legitimate infrastructure domains like this one don't need about pages, contact info, or privacy policies. They're not businesses. The real trust signal here is the domain itself: it's hosted on Google's own network (AS15169), uses a valid SSL certificate from Google Trust Services, and has no history of malware or phishing. So if you're asking 'is rr5---sn-oguesnd7.googlevideo.com a scam?' the answer is no. It's just a server doing its job behind the scenes. If you ever see this domain in your browser's address bar during a YouTube video, that's normal — it's where the video chunks are coming from.