Obama's Rose Garden speech ...
This is ABC news coverage. I wanted to hear the whole thing again myself. In this speech he does NOT mention the video directly. It does appear that his phrase "acts of terror" was referring to 9/11/2001 since it followed his reference to that event. He does not use the word "terrorist" in the speech.
The reporter coverage following the speech alludes to the video, making it seem that although it wasn't part of the "official" speech it was additional information given to the media. That is unclear, however. I think that Carney's later comments (not sure which day) was when the video story had begun to "gel" as the reason for the attack.