Pup, once I installed the DivX stuff the video works fine. Yes, the plane is in shadow on a clear day when there is nothing to block the Sun's light. (The smoke overhead should not affect the plane when it is hundreds of feet from the South Tower.)

In addition, "UA 175" actually gets lighter as it approaches the South Tower. So, if the smoke is a factor it should be more of a factor the closer it is to the South Tower.

Thanks for your input.