To log in on Dtube you need to use your steemit id and the password can be found on Wallet - Permission there is a Posting password you press show private key and use that password to log in on Dtube.
For Steemit chat you need to create a new account that will be used only for chat, try to use same name as here so people can find you easyer.
RE: Hi my name is Adi. I am shy come and say hi. #introduceyourself