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> Call a url at google.com with a unique id and the response from that URL will tell yt if you are already signed in. I don’t think this is possible. When Goog

> Call a url at google.com with a unique id and the response from that URL will tell yt if you are already signed in. I don’t think this is possible. When Google.com receives an HTTP request from Youtube.com, Google cannot know which user it is because the user visited Youtube.com anonymously.

vaidhy 4y ago
If you open youtube.com in a private window, it does not auto-login as expected. Maybe, I am misunderstanding your question?