When you come across a domain like rr3---sn-aigzrnze.googlevideo.com, the first question is usually: is this a legitimate website or something to avoid? The short answer is that it's a piece of Google's global video-serving infrastructure, not a standalone business or a scam page. The 404 error you encountered is normal — it means the specific URL path you requested does not exist on that server. For a site that simply delivers content, that is not a red flag.
So what do the signals tell us? The security setup is strong: a valid SSL certificate from Google Trust Services, modern TLS encryption, and no blacklist entries. The domain itself resolves to Google's own network (AS15169), which is one of the most reputable hosting environments on the internet. There is no privacy policy or contact page here, but that makes perfect sense — this is a backend server, not a store or a service that collects your data. If you are wondering whether rr3---sn-aigzrnze.googlevideo.com is a scam, the evidence says no. It is a routine part of how YouTube and other Google video services deliver streams to your device. You can trust it as much as you trust any Google-operated service.