GCP doesn't consider it to be an "outage" if you are able to access a website (e.g "youtube.com") and get a 200 OK response. So, when you go to the status page for the cloud service, it will show green checkmarks, meaning everything is ok.

But, the video you are trying to watch won't load, and will throw a 500 error. But this isn't considered downtime, for them.