It would have leaked out anyway and there is so much interest in the case that I have no problem with them showing it. Everyother major network would have done it too. Honestly I think CNN had the worst video with the one where you could hear those folks being murdered one by one.
Did the Klebold and Harris tape ever leak? I thought it was destroyed after the investigation.
If only Cho had contacted CNN ahead of time they would have rigged him up with a camera.