What is rr4---sn-hxb54vo-aome.googlevideo.com? It's not a website you'd visit in your browser. It's a server hostname used by Google's video delivery network β the infrastructure that powers YouTube and other Google video services. That's why the homepage returns a 404 error: direct browser visits aren't meant to work. For a CDN node, this is normal. The domain is owned by Google, uses a valid SSL certificate, and passes Google's own Web Risk safety checks. There's a single blacklist listing from one provider, but given the domain's clear relationship with Google, that's almost certainly a false positive. If you see this domain in a network request while streaming video, it's exactly what it should be: a fast, secure edge server. There's no reason to treat it with suspicion.