I could not delete the YT app as it is part of the OS I think but I did delete it from active memory. I also reset the ipad. Nothing works. Can't seem to log in. I also tried my wife's ipad and got the same rejection. It must be something screwed up in Google. I wonder how I get that fixed. As I recall, all this trouble began the last time I updated the OS on the ipad.
BTW- Did I mention that I have no trouble logging in to my Gmail account Not long ago, Google changed the YT account and made you like the Gmail PW to your YT account. I think that may have also been the time this trouble with the ipad started.
I can open up YT videos and even play them but what I can't do is upload or access my YT account info from the ipad. Anything public works.