Why can't I sign in on my YouTube app on my iPhone?

It's the original YouTube app that was already in the phone. I never updated my phone to the iOS 6.so i don't know if I'll get much help since everyone and their mothers has the iOS 6 software and a different yt app.
It signed me out for no reason and now I can't sign back in.Am I supposed to use my yt username or my gmail username without "@gmail.com" or with it? Even though I've tried everything & I know I'm writing the right password.

I've been having the same issue with my iPad, and I hear a lot of others are having this problem too. I guess it's just a glitch or something.

  • Youtube won't let me sign in on iPhone I still have the default app and never updated my software. Youtube used to let me sign in all the time! Now it just says, "Authorization Error: Invalid username and/or Password" I've tried signing in with my old username, new username, and my google account username/email too and it still won't let me sign in! Please help! I'd die without my playlists ;; A ;; The default app is in the one that still looks like a little TV that you can't delete ;-;
  • Why is it taking forever to sign into iTunes and App Store? My dad just bought an iPhone XR and is setting it up. He tried to add his apple id in settings, but it's not working. He entered his email and password but it just says "signing into itunes and app store" while loading. It's been loading for about ten minutes now, nothing is happening except for the little circle loading thing.
  • Why does gmail sign me out of my account every time I close my safari app on my iphone? This is a recent development and I'm starting to get really irritated. It started happening today after I cleared my history. Before today, I could close all my apps and when I opened them I would still be logged into my gmail account. This is no longer the case, and I'm not sure why. I cleared my cache and enabled cookies, so I don't understand why gmail is doing this. I've probably tried logging into my gmail account 10 times trying to fix this.
  • Why can't I sign into netflix on my iphone? I can sign into it on the actual website but not on my iphone app or xbox app. I have the correct e-mail and password and i even tried changing the password twice and its still saying incoreect information. This is pissing me off, why can't i sign in?