19:39 GMT. Youtube is down. Confirmed by http://downforeveryoneorjustme.com/http://youtube.com
"Huh? doesn't look like a site on the interwho"

Seems like people start noticing it:
http://search.twitter.com/search?q=youtube+down

But nothing on
http://blogsearch.google.com/blogsearch?num=10&hl=en&ctz=0&c2coff=1&as_epq=&as_oq=&as_eq=&as_drrb=q&as_qdr=h&as_mind=1&as_minm=1&as_miny=2000&as_maxd=1&as_maxm=11&as_maxy=2008&lr=&safe=active&q=youtube+down&ie=UTF-8&scoring=d

Oops. It's back live. Sorry for this false alert (but it was down for around two minutes here, in London).

In Canada its been down since about 10 o'clock yesterday evening.. maybe its just me, but it says 400 bad request.

and here is exactly what it says, followed by a cookie error which I can not give you for privacy reasons, then followed by the embedded and the link.

Bad Request

Your browser sent a request that this server could not understand.
Size of a request header field exceeds server limit.

one more thing,it says 400 Bad Request at the top where there webpage heading is...

for example on this page the heading says Youtube's down! – Google Blogoscoped Forum

just firefox.. i checked my safari finally out of desperation..and ti works on there..