The whole "response to a video" and "terrorist attack" are not mutually exclusive concepts, so I think we need to be careful there. The issue is whether the terrorist attack was preplanned and coordinated, or whether it was a bubble over from protests over the video, and what the timeline on understanding that was. So I didn't read too much into her generally telling others that we lost an ambassador to a terrorist attack.
The narrative painted by some of the questioning was that Clinton knew it was preplanned and lied to the public about that. Clinton's testimony didn't establish that, it contradicted that - as we expected it would. Now, whether you're willing to take Clinton's testimony at face value, that's a different conversation.
She actually testified about the timeline of the intelligence she supposedly. In a nutshell, here's what she said:
9/13/15 - they got an intelligence assessment that stated that the intelligence community, as a whole, believed the attack to have originated as a spontaneous one fueled by the video
9/14/15 - this was the infamous media tour that everyone talks about.
9/18/15 - video of the attacks were acquired. After review of the videos, the intelligence community revised its assessment, stating that they now believed the attack to be a preplanned, coordinated event.
If Clinton's testimony turns out to be a lie - then we have established something. The committee should have documentation of all those assessments from one of, if not all, the past investigations, so if that's the case we will find out soon enough. And if that's the case, hello perjury and goodbye Hillary.
Otherwise, I still see this hearing as having resulted in a big nothing burger. But that's just my take away.