Actually, you may believe what you posted but its not anything close to logic or fact. Military pilots don't "just decide" to fly anywhere: they are tasked with specific missions and objectives by their higher ups. Yes, they have to make decisions at times, but those decisions are also governed by their rules of engagement, also formulated by their command structure. The conversation played on the videos demonstrated they sought confirmation that firing on first the pedestrians and later the van were within their rules of engagement.
Is it a cover up? I don't know. Two "sides" of the incident have come out and they don't agree on some things but there seems to be a lot of holes in the 2nd version to just say that that the US military lied about what happened. If it is a cover up, its pretty low scale and more by omission than by outright deception. The loss of life could be a tragedy, especially if the van was civillians acting in good faith, but I don't shed many tears over the armed insurgents fighting for a cause they believe in or the reporters trying to become famous for their daring exploits in the name of more sensationalism passing for journalism.