You've landed on a subdomain of googlevideo.com — that's a domain Google uses to serve video content for YouTube and other Google services. The 404 error you see is normal: this server isn't meant to be browsed like a regular website. It's a backend endpoint that delivers video files when called by a proper application.
For anyone wondering 'is rr5---sn-8xgp1vo-ab5e.googlevideo.com safe?', the answer is straightforward. The domain is part of Google's infrastructure, with a valid SSL certificate, clean blacklist status, and no security threats detected. The lack of contact info, legal pages, or an about page isn't a red flag here — those don't apply to a CDN node.
Reviews of this kind of endpoint are irrelevant because it's not a business. You won't buy anything or create an account. If you're encountering this URL while watching a YouTube video or using another Google service, you have nothing to worry about. It's just a piece of the internet that works quietly in the background.