If you've come across the domain rr4---sn-8xgp1vo-cvn6.googlevideo.com, you're likely looking at one of Google's backend video delivery servers — not a standalone business or consumer website. The URL returns a 404 page because it's not meant to be visited directly; it's part of the infrastructure that powers services like YouTube.
For a server of this type, the trust signals are exactly what you'd expect. The SSL certificate is valid and issued by Google Trust Services. The domain resolves to Google's own network and isn't listed on any blacklists. There's no contact page or privacy policy here, but that's normal for a backend server — Google's general terms and privacy policy cover this service.
What does this mean for you? If you encountered this URL in a video stream or network log, it's legitimate. The rr4---sn-8xgp1vo-cvn6.googlevideo.com reviews you might look for don't apply here because this isn't a site you buy from or interact with directly. It's a piece of Google's infrastructure, and based on the evidence, it's safe.