ok to get you tube working....
1)update svn repo and install latest version of addon4xbox.
2)Then go on addon4xbox, click on install unofficial add on, click xbmc.org add-ons repo and install it
3) then go back and go into "get add-ons" bitand click on "xbmc.org add-ons". you know if its the correct repo because their is about 70-80 plug-ins inside...
4) look for you tube v2.1.0 ( or something similar to that version :S)
5)next u need to install anarchintosh repo. you will find this in the install unoffical add on section.
6) install ice films from the anarchintosh repo as it has a module in it that is need to play videos in youtube plugin
7) hey presto you are cooking on gas..... youtube plugin should now work
any problems post below
hcf try this first, it should have you o youtube in 2 mins, if you still cant get on ill post my folder
also, before i forget... if you tube suddenly stops working, go into xbmc.org repo and simply update the youtube plugin.