If you've come across r5---sn-8xgp1vo-vgql.googlevideo.com, you're looking at a subdomain of Google's video delivery network. It's not a store, a blog, or any kind of business site — it's a technical endpoint that likely serves video data to apps like YouTube. The 404 error you're seeing is normal; this domain isn't designed to be visited in a browser.
For a site in this category — infrastructure — the usual trust signals like a contact page or privacy policy simply don't apply. The important things are all in order: a valid SSL certificate, clean reputation records, and ownership by one of the most established tech companies in the world. There's no evidence of scams or malicious activity.
The bottom line: you don't need to worry about this domain being dangerous, but there's also no reason to interact with it directly. If it appears in a URL bar, it's likely part of a legitimate video stream from a Google service.