You are not connected to the Internet.
Try to call any internet-site! If this site comes up, your connection
is ok and the mistake lies elsewhere. If not, your connection to
the Internet is interrupted. The source of error can be multifaceted.
Retry to connect with your provider and ask you administrator.
The video-server is out of service
Call another video in the Internet, for example from http://www.realnetworks.com/.
If this video runs properly, the video- server you tried to connect
with is out of service. The only thing you can do is to try to connect
later again. If you get the same message however, you will find
all further sources of error and their solutions help-site