If you've come across the domain rr4---sn-jvhj5nu-qufz.googlevideo.com, you're likely looking at a URL used by YouTube to stream video content. It's not a standalone website, and it won't show you a normal page — that's why a 404 error appears when you try to visit it directly. This is a backend server address, part of Google's massive video delivery network.
So, is rr4---sn-jvhj5nu-qufz.googlevideo.com safe? Absolutely. The domain belongs to Google, and the connection is encrypted with modern security standards. There are no blacklist entries or malware flags. You don't need to worry about phishing or scams here — this URL is simply a piece of YouTube's technical infrastructure.
For anyone asking 'is rr4---sn-jvhj5nu-qufz.googlevideo.com a scam?' the answer is no. It's not a fake or malicious site. The only reason to see this domain is if a video request was interrupted or misdirected. In that case, refreshing the page or trying the video again usually fixes it. There's no reason to distrust this domain.