Just some thing i found lads!
1) install vlc on your pc and make sure you tick the box activex plugin and mozilla plugin
2) now in windows use the run command and type "C:\Program Files\VideoLAN\VLC\vlc.***" --intf wxwin --extraintf=http < make sure you include the " before the c
3) setup up vlc server on dreambox with pc ip address and set port to 08080.
4) goto youtube plugin select a vid and it should play
To setup the VLC front end read my guide on Divx on the DM800 here
http://www.sat-universe.com/showthread.php?t=153194
Ferret