I’m pretty sure it was mentioned before Benghazi took place on the day of the Cairo riot. For a while there the press wasn’t sure what youtube video the embassy was talking about.
I have had to go through all of my bookmarks to find something on that aspect and have found this so far...
White House Contacted YouTube During Benghazi Attack, Darrell Issa Says (more than Youtube)
And then there is this...
Here are two important blog posts from Sept. 11th 2012 and Sept. 12th 2012. Both are left-leaning but they expose what was going on behind the scenes to promote the "Youtube video" propaganda.
Obscure Film Mocking Muslim Prophet Sparks Anti-U.S. Protests in Egypt and Libya
By ROBERT MACKEY and LIAM STACK September 11, 2012, 7:25 pm
(notice the time stamps both of the original posting and the updates)
A Timeline Of The Attacks In Libya And Egypt -- And The Responses
Brian Beutler – September 12, 2012, 8:50 PM EDT
(this posting was intended to buttress the phony "Youtube video" lie but it also exposes the exact timeline of the tweets from the Cairo embassy, the State Dept. and Hillary Clinton herself making apologies for the "Youtube video.")