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The video blur could be hiding a "true" bend.
It shows a sharp focused clubshaft because the camcorder's inbuilt algorithm instructs the camera to produce a composite photo that is compositionally coherent when faced with multiple blurred moving images. It chooses one-of-many clubshaft images that occur within the time space of one frame as being a representative clubshaft image.
I think that one can trust the accuracy of the Tiger Woods Nike Commercial swing video because the frame rate was 4,000 frames/second. Interestingly, there is no clubshaft bend post-impact in that video.
I don't know if the GD photo series was made with a still digital camera, which can have a fast shutter speed of 1/8,000th second and where each image is a single frame captured at 1/8000th second. If the images were captured with a still camera operating at >1/8,000th second, then they should be accurate.
Jeff.
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