When you land on rr3.sn-4g5lznls.googlevideo.com, you get a 404 error and a security warning. This isn't a consumer-facing site. It's a backend server owned by Google, but the SSL certificate doesn't match the address, so any connection is insecure. There's no content to review, no contact information, and no track record. For a server meant to deliver video content, this configuration is broken. If you came here expecting a working website, there's nothing to use. The domain itself is legitimate, but this particular subdomain isn't set up correctly. There's no scam evidence either, just a dead endpoint. The safest move is to avoid it.