404. That’s an error.

The requested URL /accounts.google.com/ServiceLogin?uilel=3&hl=en&passive=true&continue=https%3A%2F%2Fwww.youtube.com%2Fsignin%3Ffeature%3D__FEATURE__%26next%3D%252Fwatch%253Fv%253DI7uOl4-3-lk%26hl%3Den%26action_handle_signin%3Dtrue%26app%3Ddesktop&service=youtube was not found on this server. That’s all we know.