Having linked your YouTube and Google accounts last year, YouTube has now enforced the use of the latter's password for signing into YouTube from mobile clients such as the Symbian/S60 version (available in, for example, the Ovi Store and on m.google.com). Screens and more info below.
This applies to all those whose YouTube accounts had been created before May 2009. You can still use your original YouTube login name in the YouTube client, but now have to use your Google password. Just thought I should warn you before you start staring at the failed login screen in puzzlement!
