Looks like the runescape method no longer works. Or do I need to turn off the "login with your phone" feature on my Google account?
What happened to me was I was signing out of my devices though Google Account Security last week and I signed out of Linux thinking it was the NAS that I was no longer using. I confirmed that was me, turned off two step verification, and turned on less secure apps. The only thing that worked for me was being able to logon to RuneScape through the browser. I created a throw away Gmail to test and I'm able to logon to the YouTube app directly just fine. I'm wondering if when I signed out that first time that any subsequent changes aren't overriding it.