Watch Ahmadinejad's face here.
He's not being feared. He's being laughed at. Imagine how the Iranian people feel seeing these clips (and they're seeing them). Imagine how the rest of the Iranian government feels being made to look so foolish -- and all for this jester's dreams of personal aggrandizement.
The Bush administration has long upheld that our best weapons against Iran are our unwillingness to speak with them and the threat of bombing. They've failed. But our willingness to expose Ahmadinejad to the risks of free ands public speech, combined with YouTube, may prove to be far more potent.