I'm not passing judgement here on Assange or the US's case against him. Just noting that the prosecution case seems to focus on the fact that US intelligence docs being released puts American lives at risk.

The prosecution's case doesn't seem to imply that this video is not evidence of war crimes but that its release doesn't absolve him of the crime of releasing other documents.

The linked article seems pretty light on details so it's difficult to make much out of it directly.