You must use ONLY your Private POSTING key.
DTube will not allow you to use your password, Active key, or any other key. You should only ever use your posting key to login unless you are logging in for a one time transaction with your wallet.
Your posting key is under Wallet->Permissions You must then press the button that says "Show Private Key"
That is the only key you can use to log into DTube.
Awesome! I followed your advice and I logged in 1st try! well done, Thankyou Thankyou Thankyou!!!
ps. did I say Thankyou?!
=))
You're very welcome :)