Thanks a lot, Peter.
Now the monitor.flv works fine, the Youtube Videos are more difficult. In the Transcoding-Pane, i can see them " Paused by 100,0 % ",
but still not working.
But its ok, maybe it takes a bit longer, to get them pretranscoded.
My fault was not to add the URLīs to the Library, i just put them in the Window by rightclicking " add "...
So many thanks again, and have a nice Day !!!

llorc