How to implement authorization through YouTube on the site?

Question

YouTube

I would like to implement authorization on my site via YouTube, so that there is a button, by clicking on which data is transferred to the site into a variable ( user's first and last name, number of subscribers, avatar ) So that after this data can be written to the database and displayed on the site user. uLogin cannot be connected. If it's not difficult, describe the whole process in more detail, I don't really understand

Answer 1

Everything is described here. For example, in the javascript section, the first example is oauth authorization.
https://developers.google.com/youtube/v3/code_samples/
Rep with examples:
https://github.com/youtube/api-samples

Answer 2

As far as I remember, YouTube is a Google service, and the account in all its services is the same.
Presumably the authorization process is described here and here .