problem and workaround for Youtube api calls from Google Apps script

When trying to implement the earlier solution to one of our channels, the script would fail, complaining that the user was not authorized for live streams. Interestingly, when using google api explorer, it asks whether to use the google account or the youtube brand name. If we choose the latter, it works.

The issue and its solution are discussed at  

YouTube Apps Script API only runnable by accounts without a YouTube channel? - Stack Overflow

Accordingly, started work on a script of our own, based on this blog post, but paused development since manual creation of broadcasts was preferred due to the complicated setup which depends on GDrive service which would fail at least once a month as my previous experience with Drive service shows.

The one take-away from this exercise seemed to be that the 'consent screen' needs to be set to 'Production' for this workaround to work, otherwise the Oauth doesn't proceed.