There is no clearly-defined cause and resolution to
this basic error message. The way I understand it
is that it's most likely a temporary communication
breakdown between your computer and someone's
server -- either your ISPs, YouTube's or any route
that your "uplink" might take. That's why it's a "1.1"
-- nobody really knows.
Here's what I was able to find for you on Microsoft's
support website. I have also included for you the full
URL address, followed by its direct link.
I hope that my answer has been at least helpful 4U.
CAUSE
This issue can occur because the Hypertext Transfer
Protocol (HTTP) 1.1 is used with Internet Explorer 5
and later to gain access to OWA, and the HTTP 1.1
protocol is not supported by all firewalls. If the HTTP
1.1 protocol is not supported by the firewall, certain
packets from the client are blocked and you receive
the error message in the "Symptoms" section of this
article.
RESOLUTION
To resolve this issue, implement a firewall solution
that supports HTTP 1.1 packets.
WORKAROUND
Modify the firewall so that the firewall passes all the
HTTP packets regardless of the protocol
support . microsoft . com / kb / 267910
http://support.microsoft.com/kb/267910