This domain is a subdomain of googlevideo.com, which is owned by Google and used to serve video content for services like YouTube. It returns a 404 error when accessed directly because it's not a user-facing website — it's a backend server. For that type of host, missing contact info or legal pages is completely normal and not a red flag.
When looking at whether rr1---sn-hgn7rn7k.googlevideo.com is a scam, the evidence points clearly to no. It uses strong encryption, is hosted on Google's own network, and has no history of abuse. The lack of a Trustpilot profile or social media presence doesn't matter here — this isn't an e-commerce site. The clean blacklist status and valid SSL certificate are exactly what you'd expect from a legitimate infrastructure component.
If you see this domain in your browser's address bar or in a video stream's URL, it's simply part of how Google delivers content efficiently. There's no reason for concern. Reviews of this hostname generally confirm it's a standard part of Google's video delivery system.