See subject. If no login credentials are given (i don't use a youtube
account), first run shows a login error. No big deal, and obvious
enough why it happens, but may confuse some users.
Nothing interesting in the log. Steps to reproduce:
1. install youtube 1.8.1 from repo
2. run plugin
3. use defaults and hit OK
4. see message "Login -- Unknown error"
To re-reproduce, remove settings.xml from the addon_data folder and repeat 2-4.